Gold Cover 2006 - emamc.org.uk

MSA KART RACE YEARBOOK – 2006

A3.8 General. A working ignition kill switch must be fitted and marked with a blue triangle toassist marshals in the event of an incident.A3.8.1 Retail Prices. All prices will be subject to an agreed yearly increase. The retail price of thenew assembled kart chassis, as homologated, including brake, chain guard, sprocket carrier, axlesprocket, tank, seat, wheels, but excluding tyres and fairings must not exceed £1372 plus VAT andmust be available in standard form.A3.8.2 Weight. Model B1 minimum 93kg including the driver, Model B5 with electric starterminimum 103kg including the driver.A3.8.3 Plates. Green with White numbersA3.8.4 Age. 8th birthday to the 31st December of the year of the 12th Birthday.

B1.0 Group: Junior, Direct DriveB1.1 Class: Formula Rotax Junior UK

Affiliation: Commercial: J.A.G. Engineering & ABkCB1.2 Introduction: This class endeavours to provide performance approaching that of JuniorI.C.A. combined with low running costs and low noise levels. Lap times are similar to those ofJunior l.C.A. It is expected that the class will continue to evolve during its early life and thepromoters reserve the right to alter the technical regulations at short notice to ensure safety of drivers,fairness of competition, economy and the wishes of competitors. Enquiries to J.A.G. Engineering,1 Windsor Business Units, Wealden Business Park, Crowborough, East Sussex TN6 2JJ,☎ 01892 611805.B1.3 Chassis: Any chassis conforming to MSA Direct Drive Regulations.B1.4 Engine: The only engine permitted in this class is the Rotax FR125 JUNIOR MAX.The Junior Max adheres to the Senior Rotax FR l25 Max fiche plus extensions for the Junior includingthe cylinder and the carburettor differences. The cylinder is to be of non-Power Valve type. The engineis a single cylinder, liquid cooled, reed valve two stroke. All engines must be sealed between cylinder,crankcases, cylinder head and the reed valve block with an official seal to prevent modification.All engines are issued with an official identity card. It is the competitors responsibility to ensure thatthe numbers inscribed on the engine and seal must correspond with those on the identity card at alltimes Only authorised dealers will be issued with seals for use during maintenance of the engines. Theidentity card must be filled in and signed by an authorised dealer. The engine must be presented atscrutineering with the official class seal intact and the identity card lodged with the scrutineer. Thecard must be collected by the competitor at the end of the race meeting. (At club race meetings it isnot compulsory for competitors to lodge the identity card with the scrutineers. The identity card mustbe available for inspection by the scrutineers at any time during the race meeting) Should a sealbecome damaged, loose or lost during racing it must be reported to the meeting’s scrutineer beforeleaving parc ferme. To allow the competitor to continue racing the scrutineer may at his discretion re-seal the engine with an official MSA seal. The new seal No. must be entered in the engine’s identitycard and signed by the scrutineer. The engine must be taken to an official dealer with MSA seal intactto be re-sealed with an official class seal before competing at the next race meeting.B1.4.1 Modifications: The engine and its ancillaries may not be modified in any way unlessotherwise indicated by these regulations or the official MSA fiche. UNLESS IT STATES THAT YOU CAN DO IT YOU CANNOT!!!The engine must be raced in standard form as manufactured and supplied by Rotax unless otherwisestated. Filing, grinding, polishing, surface treating, machining or lightening of any component isforbidden unless otherwise stated. The addition of material to any component is not allowed unlessotherwise stated. All parts used in or on this engine must be of original manufacture or source assupplied by Rotax except where expressly allowed. The engine is to be used with air box, carburettor,fuel pump, radiator, wiring loom, ignition system and exhaust system as supplied by Rotax unlessotherwise stated. Position and method of mounting the battery, wiring loom and exhaust system arefree providing they are securely fixed to the satisfaction of the meeting’s scrutineers and inaccordance with MSA Regulations. Filing of crankcase to allow easy fitting of water connection isallowed. Fitting of helicoils and inserts to repair damaged threads is allowed, except for the spark plugthread in the cylinder head insert, providing such repairs are not used to derive any benefit other than

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Gold Book 2006 TEXT.ps - 11/15/2005 13:23 PM



rectification of damage. The use of thermal barrier coatings/ceramic coatings on or in the engine orexhaust system is not allowed. Replacement connectors to repair wiring loom are permitted. Repairsto starter motor are also allowed.B1.4.2 Carburettor: Dell’orto VHSB 34 QD or QSAll parts of the carburettor including the body are to be unmodified and run as supplied by Rotax. Thecarburettor must have VHSB 34 (cast in body) QD or QS (stamped on body). All parts must complywith the official fiche. The only adjustments allowed are the main jet, external air screw, throttle stopadjustment screw, and needle position on the five grooves provided. Needle jet atomiser FN 266.Choke jet 60.Idle jet 30, idle jet emulsion tube 30. Needle K27 or K98 (Rotax Part No 261191). Floatneedle valve 150. Slide 40. Floats 5.2gr. Atomiser Type 2. The venturi must have 34 cast and 12.5 or8.5 stamped on the top of the venturi. Throttle cable and adjusters are free. It is permitted to use asingle length of vent tube looped across the two air vents of the carburettor with a hole or slot cut inthe side of the vent tube at the top of the loop.B1.4.3 Fuel Pump Only Mikuni - Fuel Pump DF 44-210 Part No.994482 may be used. Fuel pump must be fitted to thebottom of the standard air box bracket. Only a single length of pulse tube from crankcase connectorto fuel pump may be used. Only a single length of fuel line from fuel pump to carburettor may beused. It is permitted to use an in-line fuel filter as supplied by Rotax between the fuel tank and fuelpump. An Internal fuel tank filter is also permitted. No restrictors, fuel returns or additional reservoirsare permitted.B1.4.4 Intake Silencer: The air box supplied with the engine must be unmodified except for thebottom half of the air box where the lug support ribs, on the longitudinal side, may be removed toallow the fitting of the air box support bracket. The air box must be used with its filter in place.a) In dry race conditions the air box MUST be positioned with inlet trumpets to the bottom of the box.The air box must be securely fitted in a manner to prevent rotation.b) In wet conditions i.e. only when declared a wet meeting by the Clerk of the Course the air box maybe fitted in any positionc) If the meeting is declared open: Kart on wet tyres – position free; Kart on Dry tyres – fix as dry d) An 8mm diameter hole is permitted in the bottom airbox half.B1.4.5 Exhaust System: Only TYPE B Part No.273072 exhaust may be used. The exhaustsystem and silencer may not be modified in any way except for the pop rivets securing the silencerend plate may be replaced with screws. The use of a jubilee clip to secure the end plate pop rivets orscrews is allowed. It is permitted to paint the exhaust system with black paint and to replace thesound absorption material to retain its efficiency. The use of any other coating or plating is notallowed. It is permitted to make minor repairs by welding or braising to the exhaust system providingthere are no alterations to the original dimensions.B1.4.6 Cooling System: The radiator must be fitted to the right hand side of the engine usingstandard hoses and connections as supplied by Rotax. Engines using the thermostat cooling systemmust use the system in its entirety which comprises of thermostat head cover, radiator, radiator cap,radiator hoses, steel crankcase water hose connecting tube and radiator bracket. It is permitted touse the thermostat cooling system with or without the thermostat in place. The use of alternative hoseclips and screw fixings are permitted. Blanking of the radiator is free providing it does not necessitatethe modification of the original components other than simple attachment. Minor repairs to theradiator are allowed.B1.4.7 Ignition unit: DENSO digital battery ignition, variable timing with no adjustment. Ignitioncoil must have “129000-“ and “DENSO” moulded on the case. The ignition coil must have three pinconnection. The ignition coil must be mounted by means of two original rubber mounting blocks orequivalent to the gearbox cover. In the case of chassis component interference with the originalmounting position it is permitted to relocate the ignition coil by the use of an extension bracket. Theextension bracket must be attached to the original gearbox cover mounting holes. The ignition coilmust be mounted by means of two original rubber mounting blocks or equivalent. Spark plug capmust be marked with “NGK TB05EMA”. Ignition switch can be either On-Off type, part number265592, or Automatic fuse type, part number 265590.B1.4.8 Spark plug: The only spark plugs permitted are as listed and must be unmodified withsealing washer in place. The list of spark plugs is as follows:-

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Denso IW24, IW27, IW29, IW31.Champion QN84, QN86.NGK BR8 EG, BR9 EG, BR10 EG, B8 EG, B9 EG, B10 EG, B8 EGV, B9 EGV, B10 EGV, BR8 EIX,BR9 EIX, BR10 EIX.Other makes/types may be added to this list by J.A.G.; details will be published in official bulletin.B1.5 Transmission: Direct from the engine to the rear axle via a single length of chain. Theclutch supplied with the engine must be used with its standard components. The clutch must engageat a maximum engine speed of 3000 rpm. See N.15.3.3.B1.6 Brakes: Hydraulic disc brake operating on rear wheels only.B1.7 Tyres: Dry: VEGA SL8 Marked ‘J.A.G.’ 10 x 4.50-5 front, 11 x 7.10-5 rear

Wet: VEGA W2 Marked ‘J.A.G.’ 10 x 4.20-5 front, 11 x 6.00-5 rearB1.8 General. An ignition kill switch must be fitted and must be identified with a blue triangle toassist marshals in the event of an incident.B1.8.1 Retail price: Not applicable.B1.8.2 Weight: Minimum of 145 kg including driver at all times.B1.8.3 Number Plates: Red with white numbers.B1.8.4 Age: 13th birthday to 31st December of the year of 16th birthday.B1.8.5 Non-Technical Items. The use of alternative fasteners, washers, hose clips, fuel andpulse line is allowed unless otherwise specified. The use of additional and alternative earth straps isallowed. The use of additional air box support brackets, radiator support brackets, coil-mountingbrackets, chain and clutch guards is allowed providing the fitting of these does not necessitatemodification of the original components. B1.9 Data logging. Data logging is permitted; data logging systems with or without memorymay be used. It is only permitted to take readings of engine r.p.m., engine water temperature, speedof 1 wheel, an X/Y accelerometer, lap times and split lap times. The engine water temperature sensormay only be fitted in the position provided in the cylinder head cover for this attachment. The r.p.m.,may only be recorded via a sensor on the HT lead to sense spark plug pulses. The HT lead mustremain a single length from ignition coil to spark plug cap. The fitting of these sensors is onlypermitted providing there is no modification to the original engine components.

B2.0 Group JuniorB2.1 Class Junior Intercontinental A (JICA)

Affiliation CIK/MSAB2.2 Introduction. This Class is included in the Super One Series Championship and is theMSA British Championship for junior 100cc drivers. The class mimics the European class in allrespects except for tyres. All CIK references refer to the CIK Yearbook unless otherwisespecified.B2.3 Chassis.B2.3.1 Must comply with MSA Safety and Technical Regulations, Yearbook Section N. B2.3.2 CIK homologated for Junior Intercontinental A. A chassis once homologated is eligible fornine years use. New CIK homologated chassis have been introduced from 1.1.2003 which will beeligible for this class. ~ The maximum width of the kart is 140cm, this is a variation on the CIKregulation of 136cm maximum.B2.3.3 Bodywork. (N.14.15 to N.14.15.6). Side pods mandatory to MSA/CIK technicalregulations, CIK homologatedB2.3.4 Front fairing mandatory to MSA/CIK technical regulations, CIK homologatedB2.3.5 Front Nassau panel mandatory to MSA/CIK technical regulations, CIK homologatedB2.3.6 Fixed to front chassis member and the steering column supports.B2.3.7 Chassis from 1.1.2003 onwards must be used with CIK ‘08’ homologated bodywork andmatching homologated fitments and as a complete set.B2.3.8 Bumpers. Front and rear bumpers to MSA technical regulations. B2.4 Engine.B2.4.1 Single cylinder PISTON PORTED air-cooled engine without gearbox homologated by theCIK, maximum capacity 100cc, with the following restrictions:B2.4.2 Deleted

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B2.4.3 Stroke – minimum 46.0mm, maximum 54.5mm.B2.4.4 Opening angle of the exhaust to comply with figures established by CIK graph ‘A’according to the homologated stroke for the engine, tolerance included (readings by means of agraduated circle of minimum diameter 200mm or by means of a digital device).B2.4.5 Total width of the exhaust ports, measured cordially and plus any diversion between them,must not exceed 22.3 % of the total internal circumference of the cylinder established by the borestated on the CIK homologation form.B2.4.6 The shape of the exhaust ports must be rectangular.B2.4.7 Total inlet angle to comply with CIK graph ‘B’ (readings by means of a graduated circle ofminimum diameter 200mm or by means of a digital device).B2.4.8 Total width of the inlet port, measured cordially plus any divisions between them, must notexceed 22.3% of the total internal circumference of the cylinder established by the bore stated on theCIK homologation form for the engine. Number of transfer ducts free.B2.4.9 Any machining of the sleeve and or of piston allowing a flow of mixture inside the cylinderis forbidden This includes (but is not limited to) offsetting crankshaft centreline to bore centreline byany means, asymmetrical (scalloping) machining of piston crown or skirt ”breaking” the port edges onpiston and liner beyond what is necessary for the machining of the edge.The maximum break on all machined edges of piston must be 0.5mm and 0,3mm on liner B2.4.10 Volume of the combustion chamber 12cc minimum. The plug insert thread, tightened onthe cylinder head, must not extend beyond the upper part of the dome of the combustion chamber. It must be fixed to the cylinder in exactly the same way as the spark plug measuring 18.5 mm long. The original parts of the homologated engine must always pre-serve their original construction andcomply with and be identifiable from the photographs, drawings and physical dimensions describedon the Homologation Form. (to be measured in accordance with MSA/CIK defined procedure)B2.4.11 The “squish” distance between the piston and cylinder head must be 1.2mm as aminimum at all points (measured in accordance with MSA/CIK defined procedure). B2.4.11 Carburettor. One only and to be a CIK-FIA homologated butterfly type, with a centrespindle and a maximum venturi diameter of 24mm. See Drawing B1.B2.4.12 The distance between the rear side of the carburettor and the centre-line of the cylindermust not be less than 91mm (no tolerance permitted), see Drawing 5 (measured in accordance withMSA defined procedure). B2.4.13 All systems of injection and/or spraying of products other than permitted fuel areforbidden.B2.4.14 The pressure hole in the crankcase must have a maximum internal diameter of 3.25mm.B2.4.15 Ignition. Must be of the analogue type and homologated by the CIK-FIA. Any variableignition system (progressive advancing and retarding system) is forbidden. Any electronic systemallowing an auto-control of the parameters of function of engine while the kart is in motion isforbidden. An engine cut out switch is mandatory the switch must be located in such a way that it ispossible for the driver normally seated in his driving position to trigger itB2.4.16 Exhaust. CIK homologated, one per engine model and stamped with CIK homologationnumber. Additional silencers are permitted. Silencers homologated with the MSA for the class mayalso be permitted as alternatives to the CIK homologated type.B2.4.17 Intake Silencers. CIK type, minimum volume 1000cc.B2.4.18 Made from flexible, non-splinterable plastic (non metallic).B2.4.19 Air intake orifice maximum of 2 openings, form optional, maximum diameter 23mm.B2.4.20 Mounted airtight to the carburettor, mounting method free.B2.4.21 Fuel Tank. Must be securely fixed to the chassis and be built in such a way that neitherthe tank or the fuel pipes, which must be flexible, present any danger of leakage during thecompetition. A quick attachment to the chassis is strongly recommended. The tank shall in no way beshaped to act as an aerodynamic device. The tank must supply the engine only under normalatmospheric pressure.B2.4.22 Tank capacity minimum of 8 litres.B2.5 Clutch CIK homologated clutch mandatory. The clutch may be homologated by themanufacturer together with the engine or as a separate unit for the same homologation period. Suchseparate homologations are restricted to the manufacturer with a homologated engine for this class.

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Centrifugal engagement of the clutch must occur before an engine speed of 5000rpm has beenattained. An efficient protection (made of metallic material) covering the centrifugal clutch but leavingfree access to the chain or belt must be fitted.B2.5.1 Transmission. Direct drive with CIK homologated clutch so that the crankshaft and rearaxle are connected by a single length of chain or belt. N15.3.3B2.6 Brakes. Brakes must be effective and work on at least the rear wheels simultaneously. A2003 homologated braking system must be used on 2003 homologated chassis. The system mustbe complete as homologated and different components cannot be mixed.B2.7 Tyres/Wheels.B2.7.1 Wheels are free. It is compulsory to use safety screws to prevent the tyre from leaving therim (external part only).B2.7.2 Slicks – Bridgestone YGB, Front 10 x 4.5 x 5, Rear 11 x 7.1 x 5, RAC or MSA moulded

on the sidewall. Wets - Bridgestone YEJ Font 10 x 3.6 x 5, Rear 11 x 6 x 5. (K0 or later dated type onlypermitted).

When wet weather tyres are fitted the tyres may be run inside the outer plane of the sidepods(see N14.15.4).B2.8 General.B2.8.1 Retail Price. Not applicableB2.8.2 Weight. Minimum 135kg with driver at any time. The minimum weight of the kart (withoutfuel) is 65kg. B2.8.3 Plates. Yellow plates with black numbers.B2.8.4 Age. 12th birthday to 31 December of year of 16th birthday. Minimum licence grade KartNational A. Drivers who have not reached their 13th birthday must provide evidence that they haveheld a National A licence for at least 12 months prior to competing in this class.B2.9 Notes.B2.9.1 Data Logging is permitted, any information logged may be viewed on request by theeligibility scrutineer.B2.9.2 Homologation fiche copy and other eligibility documents regarding the equipment beingused must be made available by the competitor to the eligibility scrutineer on request.B2.9.3 Sealing of engines at scrutineering:• custom nut with hole for sealing wire• replace one cylinder head nut with custom nut per engine• drill a fin of the cylinder head in the vicinity of the custom nut• sealing wire to be threaded through custom nut and hole in fin• Scrutineer to fit official seal and record seal number(s)B2.9.4 Methods of measurement are published by the MSA. These will be applied in all instanceswhere measurement is required.B2.9.5 Modifications. Any modification is forbidden if it is not explicitly authorized. Modificationincludes any operation likely to change the initial aspect, the dimensions, the drawings or thephotographs of an original homologated part.B2.9.6 Adjunction of material or parts. Any adjunction or fixation of material or of parts isforbidden if it is not expressly authorised. Removed material may not be used again. Rebuilding theframe geometry, following an accident, is authorized by adjunction of the materials necessary for therepairs (additional metal for welding, etc.); other parts, which may be worn out or damaged, may notbe repaired by addition or fixation of material, unless these Regulations specifically authorizes it.

B3.0 Group Junior and SeniorB3.1 Class Formula TKM

Affiliation Commercial – Tal-Ko/ABkCB3.2 Introduction. Commercial economy class for juniors and seniors with chassis and engineprice control. Super One ABkC Championship class.The optional use of clutches for the Formula Junior TKM class was permitted from 1.1.96 and insenior Formula TKM from 1.1.97. Extreme class engines for the senior class may be raced fromFebruary 1, 2004. It is expressly underlined that all seniors should race together and that all senior

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engines should be upgraded to this specification over the course of time. However in the short termclubs may if they wish split grids accordingly. The class regulations have been developed by Tal-Kowith the help of Formula TKM drivers, the BKIA, and the ABkC. The control of the class regulationsrest with Tal-Ko and these regulations are printed with the permission of Tal-Ko. The regulations arethe same as those published by Tal-Ko. Additional regulations for the ABkC follow the main text.Further copies of the full regulations are available from Tal-Ko, Sunderland Road, Sandy, BedfordshireSG19 1QY, tel. 01767 682020.B3.3 Chassis. B3.3.1 Homologated British made chassis with side pods and front fairing. Each manufacturermay only produce two homologated chassis at any one time. When a manufacturer already has twohomologated chassis, if he homologates a new design, he cannot continue to produce chassis to theold homologation. British made means the frame, stub axles, bearing hangers, welded brackets, floortray, rear bumper and all steel tubework must be fabricated within the UK. All the associated toolingand jigs for the above components must at all times remain in the UK and be available for inspectionat any time. From 1.1.2004 a new chassis homologation period came into force. From this datemanufacturers may only produce and sell new karts holding 2004 homologation documentation andbearing the appropriate chassis markings. Reference in this document to 2004 homologation kartsmeans any kart listed in the appendix of karts covered by the 2001 homologation period.B3.3.2 Drivers may compete in any homologated chassis that appears in Appendix 1, providing itmeets all other requirements. The next homologation period will commence 1.1.2007.All chassis made after 1-3-94 must carry the official Formula TKM sequential plate securely riveted tothe brake side bearing hanger together with the manufacturer's stamped chassis number. Thesesequential plates are unique to each kart, non transferable and must only be applied by themanufacturer at the time of manufacture. Karts under the 1998, 2001 and 2004 homologation listmust not have detachable plates carrying the manufacturer's chassis number and year ofmanufacture. Chassis number must incorporate the year of manufacture. In the case of lost/damagedsequential plates, a special procedure is used to issue replacements via the manufacturer.B3.3.3 Chassis to be constructed from magnetic steel tubing, cross section free. The method ofwelding/brazing is free but for all main chassis joins welding/brazing is obligatory – i.e. no clamping,sliding members or torsional adjustments including additional bolt-in torsion bars. The use of any typeof hydraulic or similar damping device for any purpose is specifically prohibited.B3.3.4 Engine must be mounted to the right hand side, driver seated facing to the front.B3.3.5 The rear axle must be of parallel magnetic steel, 30mm nominal diameter, with hubretention. The axle can be either solid or hollow with a minimum nominal parallel wall thicknessthroughout its length of 5mm. It must be supported in two bearings only, using any type of bearingand retention method including cassette type. No other bearings or stiffening devices may beattached to the rear axle for any purpose. It is permitted to use circular collars around the rear axleimmediately next to the axle bearings to prevent axle movement. They must not exceed 12mm inwidth and must be fitted for the sole purpose of axle location. It is permitted to semi-drill the axle forgrub screw location.B3.3.6 Rear axle quick release fittings are permitted. Hubs may overhang the ends of the rear axleproviding they are expressly designed to do so. Bearing spacers or adapters are permitted.Adjustable rear ride height not permitted. Use of non original parts to effect changed rear ride heightnot permitted. See list of 2004 homologation rear ride heights in Formula TKM official rule bookappendix.B3.3.8 The steering must have non-adjustable castor and camber angles. Castor and camberangles of the chassis must be as homologated. Steering column may have more than one hole whichcan be utilised for twin-hole Ackerman type steering operation. Stub axles may contain more than onebolt hole in their drag arm. Any hole may be used. Stub axles must be as supplied by themanufacturer homologating the kart. They must appear and be mounted into the chassis in the samemanner offered for homologation and the angle of that chassis mounting must remain at all times ashomologated. In other respects such as length of axle shaft and its angle, and the drag arm lengthand attachment holes, the stub is free.The king pin bolts must be centrally positioned in both the frame stub axle mounts and stub axles.

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The position of the holes must be non adjustable and permanently mounted. B3.3.9 Front ride height adjustment is permitted by movement of washers/spacers between theframe stub axle mounts and stub axle. On 1998, 2001 & 2004 homologated chassis the maximumpermitted adjustment by this method is 12mm. No modifications may be carried out to thehomologated design to achieve or increase this.B3.3.10 All karts must have the steering column mounted in such a way that even if the bottomretaining bolt is removed it cannot pull free from its lower bearing.B3.3.11 The only additions permitted to homologated chassis are: Equipment to meet latest MSAsafety regulations, seat and a Nassau panel, along with the mountings solely concerned with theirfitment. The following must not be added: Rear, front or side torsion bars, or any parts nothomologated other than the exceptions indicated in these regulations.B3.3.12 The following parts are specifically prohibited: Components made from Kevlar, CarbonFibre, Titanium or other similar exotic materials, other than for the seat and floor tray which is optional.The use of plastic or similar materials for components such as wheels, wheel hubs/bosses, sprocketand brake disc carriers is expressly forbidden. B3.3.13 Additional bolt on seat stays/mountings are permitted to a maximum of one per side,position free. Only one bolt fixing at either end of the stay/mounting is permissible. Seat stays mustconsist of one steel magnetic tube, any shape cross section, with a nominal maximum diameter of17mm and must not exceed a maximum width of 28.5mm where flattened at each end for fastening.Any device which attempts to break the spirit of this regulation is expressly forbidden.B3.3.14 Use of sidepods and front fairing is mandatory. Type and style free but must conform toMSA Technical Regulations. Latest 2003 type CIK pods and mountings may be used. Sidepod andfront nosecone mounting bars may be either CIK homologated or UK manufactured. Chassis may useold traditional type or CIK type pod mountings but not a choice. Note that where a kart is fitted with atraditional front bumper incorporating two vertical front uprights it is permitted to make use of the CIKfront fairings. In this case, as long as the two vertical uprights remain in place, the requirement for analuminium or steel securing block as per MSA rule 14.13.2 is waived. The fairing may be attached tothe kart by any safe and secure method in two places, not necessarily the CIK type clips. Sidepodsmay incorporate suitable holes for starter shaft, airbox trumpet, etc where MSA rules permit. Theirends may be sealed to prevent the flow of water.B3.3.15 Front and rear bumpers must comply to MSA Technical Regulations. Neither mayincorporate adjustable torsion by design. Bolt in type torsion bars are specifically prohibited. Frontbumper must not use rubber, nylon or similar material in its fastenings/mountings. Rear bumper mayuse rubber, nylon or similar material for a maximum of two of its fastenings/mountings to the framebut may be secured by more than these two fixings and may for example have bracing struts to theaxle housing providing these were part of the original homologation.B3.3.16 Drivers may make use of tank tape, cable ties, thin wire or throttle cable type bowdencable in ensuring that items such as exhaust, bumpers, electrical wiring, chain guard, etc. do notcome off during the course of racing. One or more fixings may be used, however the item used mustonly be there for secondary security and reliability purposes and must not be attached in such amanner that it affects torsional adjustment of the kart or provides any other performance advantage.Cable ties should be a maximum nominal width of 6mm and wire or bowden type cable a maximumnominal diameter of 2mm.B3.3.17 Seat type is free including material. Use of commercially available and manufacturedvariable rigidity adjustment systems for seats is permitted subject to the following criteria. The devicemust be mounted to the seat itself and must not be attached or have contact with the seat mountingpoints or chassis. It is not permitted to use ‘home constructed’ non-commercially available torsionaladjustments.B3.3.18 Floor tray shape must remain as homologated and must comply to MSA TechnicalRegulations. Aluminium, plastic or other composite type floor trays may be used providing theyprovide suitable protection. Rubber mountings may be used. It is permitted to drill additional holes forthe specific purpose of mounting such items as pedal heel stops and fuel tank, and access hole forsteering column lower location nut, provided that the holes are restricted to the minimum size andnumber required to meet the purpose. They must not cause undue weakening of the floor-tray atcritical points. It is permissible to use suitable size metal, rubber or other washers in the fitment of the

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above items. It is permitted to use floor trays with decorative holes or slots so long as they areprovided by the manufacturer and that the holes etc are in the raised sector(s) of the tray.B3.3.19 The fuel tank must be floor tray mounted beneath the steering column, forward of thedriver. Type free. Fuel filter permitted either in-line or within the fuel tank or both. Maximum fuel tankcapacity 9.25 litres. A catch-tank must be used.B3.3.20 At all times the following must be original equipment parts as supplied by the manufacturerof the chassis: Chassis frame and all steel tubework including rear bumper, stub axles, pedals,steering column and brake system. They may not be replaced with bandit, non-standard, equivalents.These parts must always remain as homologated.B3.3.21 The insertion of an internal chassis strengthening steel tube, maximum length 320mm, toprevent or repair cracking of the main side rail tubes is permitted to a maximum of one per side rail.This internal tube must be positioned at the rear of the kart encompassing at least 40% of the rearaxle bearing hanger area.B3.3.22 On the grounds of safety the use of aluminum nuts and bolts is prohibited throughout thewhole of the kart including the engine.B3.3.23 In the interests of safety and driver comfort, particularly for junior drivers, it is permitted touse a brake/throttle pedal/mount which has been amended to that originally homologated with thekart subject to the following criteria. The pedals must follow the original basic design but may havedifferent diameter tubing, vary in height and have revised lugs for connections/stops. It must be madeby the original manufacturer within the UK. Revised mountings must be either welded in place by themanufacturer or bolted on. They must be strong enough for the task but must not provide any otherbenefit. It is also permitted to use add-on devices which make the pedals easier to operate.B3.3.24 Sidepod bars are free. It is not permitted to extend the width of these bars by use of anadditional sleeve or other extension between the bar and chassis.B3.3.25 It is permitted to repair a chassis by welding providing the fundamental design is notchanged and no other material is used except for the weld.B3.4 EngineB3.4.1 TKM BT82 Piston Port two stroke engine fitted with a standard Walbro WB19 carburettorstamped TKM, carb spacer block marked TKM, ignition Motoplat 9600903-1 or PVL system markedFormula TKM, TKM exhaust system complete with flex and standard TKM carb induction boxcomplete with original filter. The BT82 engine as raced, including induction box and ancillaries, mustconform, in all respects with the Homologation Fiche with its Extension and Amendments, as clarifiedand elaborated on within these regulations and any official TKM technical bulletins.B3.4.2 The engine and ancillary components such as carburettor and ignition, must be raced instandard condition as manufactured and/or supplied by Tal-Ko with no other brand or tuner identityadded. Filing, grinding, polishing, surface treating or lightening of any component is expresslyforbidden. This expressly includes any chemical or other treatments intended to smooth the flow ofair/fuel within the carburettor. B3.4.3 The addition of materials to any component is not allowed. Black anodising of the headand barrel must remain, subject to fiche requirements. It is permitted to mark engine measurementsand engine number on the barrel/head. External wear and tear such as accident damage causing finbreakage, or throttle spring rubbing, will be permitted.B3.4.4 While it is accepted that a minimal amount of damage is permitted to the exterior of theinduction/noise box system including its trumpet, any damage that affects the course of airflow intothe engine is prohibited. This particularly applies to the shape of the inlet trumpet at its flared end andalong its length.B3.4.5 The use of any sort of tuner name, identification or colouring on the noise box (other thanTKM) is not permitted. The noise box assembly cannot be modified except for the use of secondarysecuring methods such as cable ties and tank tape, provided that they are not used to gain anyperformance advantage other than reliability. No additional holes may be drilled in the assembly forcable ties. Tank tape must not be used to alter the passage of air into or through the air trumpet. Tanktape may be used to effect repairs but such tape must not incorporate any trade name oridentification. Latest airboxes are fitted with a black back plate incorporating a TKM logo. Previousback plates were either blue or white without logo. Latest air trumpets are black plastic replacing theprevious alloy type. All are permissible for use.

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B3.4.6 All parts used in or on this engine must be of original TKM manufacture or source, exceptwhere expressly allowed. UNLESS IT STATES THAT YOU CAN DO IT YOU CANNOT!!B3.4.7 The following minor modifications are permitted:• Drilling of a hole in a head or barrel fin to fit a throttle return spring.• Modification to, and addition of, a slot in the carb swivel assembly and carb spacer to

allow for ease of throttle cable fitment.• Drilling holes in component mounting nuts and bolts to allow the fitting of locking devices.• Extension to the high jet to ease adjustment while driving is permissible, providing the

original jet is still used and the extension does not exceed 50mm in length. Extension tothe low jet is not permitted.

• Up to three self tapping screws may be used to strengthen the fitting of the induction boxto the back-plate and up to 3 holes drilled expressly for their fitment. No other additionalholes are permissible in the noise box assembly other than those provided when the unitwas supplied.

• Drilling of scrutineer’s sealing wire holes up to a maximum diameter of 3mm, one percomponent in the fins of the head, barrel, and two crankcase halves. It is also permitted forauthorised scrutineers at a race meeting to mark engines with paint.

• Where spring location holes in the TKM exhaust and manifold bend flex spring flangeshave become worn through, it is permissible to redrill additional holes further around theflanges solely for spring retention purposes. It is also permitted to repair broken springholes and or cracked flanges with a local weld/braze repair.

• TKM manufactured brass main bearing shims may be used to facilitate correct crankshaftend float clearance.

• As an alternative to the standard black carburettor fuel pump diaphragm, it is permitted touse the beige colour fuel pump diaphragm as supplied in the Walbro WB39 repair kits, partnos. D10-WB and K10-WB.

• The small butterfly adjustment screw and spring screw which sets tickover on the carb canbe fitted either way round. It is beneficial to reverse it when setting up tickover on a clutchtype engine.

• It is permitted to repair broken ignition wires providing original type connectors are used.B3.4.8 It is permitted to paint the TKM manufactured exhaust silencer provided that only blackpaint is used and that the original TKM logo is still visible. It is expressly prohibited to use any othercoating or plating or to use any colour other than black.B3.4.9 Junior TKM must use a single TKM manufactured aluminium gold anodised carbrestrictor plate between the carburettor and engine. This is a flat metal plate with a minimumthickness of 3mm and a central parallel round bore of 20.5mm maximum diameter through which allthe mixture feeding the engine must pass. No blenders of any configuration are allowed. This partmust not be modified or polished in any way and must be as made and supplied by Tal-Ko. It mustdisplay the genuine TKM logo. Gold anodising must be intact.B3.4.10 Junior Intermediate must use the alternative special restrictor which is of the samespecification except for a 23mm maximum bore and green anodising, which must be intact..B3.4.12 Ignition timing is limited as detailed. When it is set it must be locked so that it cannot beadjusted by the driver with the kart in motion or by any mechanical and or vacuum/electronic device.B3.4.13 On Motoplat Ignition, the timing must be set to between 2.0mm and 3.0mm Before TopDead Centre. On the PVL system, ignition timing must be set to between 1.5mm and 2.1mm BTDC.Ignition timing to be measured statically using a dial indicator on the piston crown and the originalignition timing lines.B3.4.14 Engine management systems and additional fuel pumps are prohibited.B3.4.15 Connection between the carburettor and throttle pedal to be of one bowden type cable.No other means of throttle actuation permitted except for hand throttles used as easy-startmechanism. B3.4.16 It is mandatory to use the NGK spark plug cap and HT lead as supplied by Tal-Ko withnew engines. The only spark plugs permitted are as listed and must be unmodified with sealingwasher in place. The list of spark plugs is as follows:-

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DENSO – W27ES-ZU, W31ES-ZU, IW27 and IW 31NGK – B9EG, B10EG, BR9EG, BR10EG, B9EGV, B10EGV, BR9EIX and BR10EIX.B3.4.17 A minimal amount of machining is permitted to the cylinder head subject to stringentconditions, primarily intended to allow rectification of engines that have suffered head damage. Thismust be carried out in line with the drawings laid out in the fiche. Note that the squish angle face of 12degrees plus or minus 1 degree must meet and intersect the liner mating face of the cylinder head atthat angle, with no intermediary angles or curves throughout their full circumference. Any form of step,recess, groove or similar will render the cylinder head illegal since it will not follow the original shape.B3.4.18 The cylinder head and/or liner mating face(s) must remain flat. If machining or any otheroperation is carried out on the cylinder head and/or liner mating face(s), the mating faces must alwaysremain flat over the full extent of their original surface.B3.4.19 It is permitted to use helicoil type thread replacements to repair critical engine fixings onthe cylinder head, crankcase and cylinder barrel. Any other type of repair or insert is prohibited. Suchrepairs must not be used to derive any benefit other than rectification of damage. In the case of thespark plug thread, no portion of the helicoil may protrude outside of the normal thread area. The coilmust be inserted to the full length of the original thread and only one continuous coil to be used perrepaired thread. In all cases the size of the repaired threads must remain as standard. It is permittedto repair with helicoils threads within the carburettor providing they do not perform any other function.B3.4.20 When measuring the inlet and exhaust port timing it is clarified that the maximum contactpressure on the feeler gauge should be only that achieved through finger pressure on either one of thecrank nuts. The dial gauge and fixture block used for this purpose must be tightened down at 13lb/fton each of the two nuts. The nuts/studs must have threads in good condition, lubricated, and withnuts which can be easily moved by finger-only pressure at the point of being tightened.B3.4.21 All gaskets used in or on the engine must be of original TKM supply and must be fittedin accordance with the engine fiche. Only one gasket is permitted on any engine part with theexception of the barrel to crankcase mating face where it is permitted to use up to a total of any threeof the standard 3 alternative thickness TKM supplied gaskets. Use of gasket sealer/grease ispermitted.B3.4.22 It is permitted to fit additional silencing where required by MSA or local club regulations,provided that the original complete TKM equipment is still used in unmodified form.B3.4.23 The only exhaust end can permitted is that provided by Tal-Ko and marked with the TKMlogo.B3.4.24 When taking measurement of the cylinder head volume, the cylinder head must be fitted tothe engine in the manufacturer’s normal manner with the standard four brass head nuts (or approvedTKM sealing nuts) tightened to 13lb/ft and the two small allen headed bolts tightened to 8lb/ft. Thenuts/studs must have threads in good condition, lubricated, and with nuts/threads which can beeasily moved by finger-only pressure at the point of being tightened. The engine and other testequipment should be at a cold (ambient) temperature of between –5 C and +50 C. Any readingstaken within this temperature span will be accepted as definitive. The engine must be as raced - e.g.with the same gaskets in position and with no carbon removed from the top of the piston, inside ofthe combustion chamber, etc. The cylinder head may be removed for inspection by an authorisedMSA scrutineer before being replaced for a head volume check. When carrying out such a check usemust be made of the authorised and TKM marked measuring plug. Procedure should follow that laiddown by Tal-Ko. An ‘A’ grade burette should be used with oil which meets the specification (availablefrom Tal-Ko). Once it is determined that the oil level has reached the top of the measuring plug hole,the reading should be taken within 30 seconds with no more oil added.B3.4.25 As part of TKM’s commitment to noise reduction, it is mandatory to use effective heatproofwebbing or similar material wrapped around the exhaust flex to help reduce noise.B3.4.26 The use of purpose designed TKM fin rubbers is mandatory. All new engines are now fittedwith noise reducing fin rubbers as supplied by Tal-Ko. These comprise 10 special rubbers all withTKM logo and either marked H or B to indicate whether for head or barrel. Competitors must use afull set of these rubbers, which may be fitted to older engines. The use of more than 10 rubbers isallowed but not advised. Only TKM rubbers permitted. Where fins have become broken on an engineit is permitted to remove excess sections of the rubbers at this point.B3.4.27 The use of one or more TKM manufactured with TKM logo special steel cylinder head

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25

TKM BT82 CYLINDER HEADCOMBUSTION CHAMBER

SQUISH ANGLEFACE

No. 1LEGAL

No. 2ILLEGAL

No. 3ILLEGAL

LINER MATINGFACE

Formula TKM Technical Bulletin 9803, July 17, 1998 . . . page 3



retaining nuts with hole for sealing wire is permitted, even if sealing is not required. Use of such nutsmay be mandatory at championship meetings as specified in their regulations.B3.4.28 The use of both piston rings is mandatory. The rings must at all times remain free tooperate in the manner in which they were designed and supplied. It is the responsibility of the driver toensure that the rings are not ‘coked’ in place with carbon or prevented from their normal ‘spring’effect by other methods. The rings should be appropriate to the piston size used and have amaximum ring gap of 0.5mm when measured with the ring placed squarely 5-10mm down from thetop of the cylinder bore. This rule does not apply on Extreme engines with only one piston ring.B3.4.29 Where possible it is recommended that the use of officially sanctioned and part numberedTal-Ko gauges is used in checking engine measurements. In the case of any discrepancy results usingTKM approved gauges will be taken as definitive.B3.4.30 It is permitted to use a TKM manufactured with TKM logo flex ring to help increase the lifeof the exhaust flex.B3.4.31 Permitted Rebore (Extreme Specification Engines Only). It is permitted to rebore thebarrel in order to take new TKM Extreme oversize pistons 54.25 – 54.75mm. This modification maybe carried out to any age engine. It is also permissible to carry out minor machining to the cylinderhead to match as detailed in the latest fiche additions. The pistons in these Extreme engines will haveonly one piston ring. In all other respects normal Formula TKM rules apply. B3.5 TransmissionB3.5.1 The drive must be direct, i.e. the crankshaft and rear axle are connected only by a singlelength of chain. No belt drive, reduction gears, etc., permitted. Engine sprocket to be 9, 10, or 11tooth.B3.5.2 Karts may be fitted with the optional Formula TKM Horstman dry clutch. If fitted this mustcarry the Formula TKM markings and be used in unmodified form as manufactured.B3.5.3 Engines fitted with a clutch must use the genuine TKM clutch safety cover in unmodifiedform. An effective and working ignition on/off switch must be fitted to the kart and clearly marked inthe off position.B3.6 BrakesB3.6.1 Brakes must be hydraulic disc brake operating on the rear wheels only – no ABS or similarsystems. On-board adjustment by driver not permitted. B3.6.2 The brake disc must be made from cast iron or steel. Type free – may be ventilated. Thebrake to consist of one caliper, with two pads and maximum of two pistons per pad. Twin mastercylinders permitted. Disc carrier free.B3.6.3 The only brake systems permitted are those homologated and fitted by the kartmanufacturer within the chassis price limitations. No modifications permitted. This is defined as thecaliper, master cylinder and parts there-of. Pads free.B3.6.4 For the purposes of safety it is mandatory for all karts to make use of a dual connectionbetween the brake pedal and master cylinder. The prime connection may be either solid or cableoperated, with a secondary safety cable minimum 1.8mm nominal diameter set slightly looser to actas a back up in the case of failure. 2001/2004 karts will come with such fitment as standard to whichno modifications to the homologated brake system may be made. On older karts minimal safealteration of the brake system to accommodate these dual connections will be permitted.B3.7 Wheels & TyresB3.7.1 The only tyres permitted are Maxxis green label with the words Formula TKM moulded intheir sidewalls. Dry slick tyres will have green labels, wet tyres will have red labels. They must not bemodified in any way including hand or machine cutting. Tyre sizes/types as follows:Dry – (SLC) Front 10x4.50-5, Rear 11x7.10-5Wet – Formula TKM Front 10x4.50-5, Rear 11x6.00-5 B3.7.2 Heating of tyres by any artificial method, or their treatment by any chemical substance, isprohibited. Tyre pressures are free.B3.7.3 Wheels are free but must not be made of plastic type material. Wheels must be of onemoulding/casting. The use of wheels which have been cut and joined to increase or reduce width isexpressly prohibited. Front wheels may have a separate detachable hub. It is permitted to use wheelbalance weights affixed to the wheels.

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263 Goring Way, Ferring, Worthing, West Sussex BN12 5BYTel/Fax: +44 (0)1903 241921

E-mail: [email protected] Website: www.bkia.co.uk



B3.7.4 Maximum wheel width should be a nominal 122mm front and 210mm rear as measuredacross the inside edge of the beads. Maximum permitted width across the outer edges of the rims tobe 131mm at the front and 217mm at the rear.B3.8 GeneralB3.8.1 Retail PriceThe maximum retail price for the chassis is £1280 (plus VAT) assembled, less engine mount, tyres,axle sprocket, front fairing and side pods.Price for the senior direct drive Extreme or Junior/Intermediate direct drive engine new includingcarburettor, carb spacer, ignition, engine sprocket and complete exhaust is £699 plus VAT. Price for the Junior/Intermediate spec engine complete with clutch and safety cover is £775 plus VAT.B3.8.2 Weight (on completion of any part of the event)Junior TKM – min 129kg with driverJunior TKM Intermediate – min 144kg with driver. Driver must in full racing equipment weigh aminimum of 62kg. Senior TKM Extreme – min 148kg with driverSenior TKM Extreme Heavy – min 163kg with driver. The driver must in full racing equipment weigh aminimum of 80kg. B3.8.3 PlatesSenior TKM Extreme – red with white numbers.Junior TKM – blue with white numbers.Junior Intermediate – white with black numbersB3.8.4 AgesJunior TKM – From 11th birthday to 31st December of calendar year in which 16th birthday falls.Junior Intermediate – From 11th birthday to 31st December of calendar year in which 16th birthdayfalls.Senior TKM Extreme – The Class is open to any driver aged 16 or over. A Junior may transfer tothis senior class at any time during the year that he/she achieves the sixteenth birthday. Havingmoved into the senior class he/she may not revert to a junior class. B3.8.5 Additional Notes• While taking part in racing or official practice a revolution counter may be fitted. In addition

it is permitted that this rev counter or another device may also record lap times and lengthof engine running time. If such equipment is fitted with temperature sensing capability thisconnection must not be used. All other equipment used for measuring data, data-loggingor for transmitting a signal to another receiver whilst the kart is in motion is prohibited. Allsensors and related wiring and brackets must be removed from the kart for racing andofficial practice if this equipment does not comply. A rev counter with memory for revs,time running and lap times is not regarded as data logging equipment. The only exceptionto this rule applies to the fitting of officially sanctioned cameras and other recordingdevices and to transponders and other equipment required as part of the organisersrequirements for that race meeting.

• The use of “Easystart” wheels is permitted.• Only the TKM BT82 name may be used under the heading “engine” in event programmes.

No other names permitted.• The organisers reserve the right to take away an engine complete with carburettor, noise

box, exhaust system, etc. sealed by an MSA scrutineer for the purposes of power testingon the manufacturer’s approved dynamometer. The competitor and an MSA scrutineer tobe present for such testing and any subsequent stripdown, which is carried out at the riskof the competitor.

• It is permitted to add weight to the kart in order to meet minimum weight requirementsprovided that MSA regulations are adhered to. Weights must be attached within theperiphery of the main kart frame and must not be attached to the side pods and/or frontnose cone. It is permitted to add weights to the seat but strongly recommended not toadd more than a total of 2kg weight to the floor tray. No one single piece of ballast must bemore than 5kg. All weights to be fixed using a minimum of two mechanical fixings, i.e.bolts with washers.

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• When completing scrutineering cards for events it is required to enter both the chassisnumber AND the Formula TKM sequential plate number.

• In the event of any dispute the regulations and fiche with updates as published within theofficial Formula TKM Regulations & Technical Guide 2006 together with any appropriateTechnical Bulletins will be taken as the definitive documents. It is the responsibility of eachand every competitor to obtain these regulations and fully implement them. Ignorance ofany rule will not be a defence.

All rules effective January 1, 2006, A copy of the Formula TKM Regulations and Technical Guide 2006 including the engine homologationfiche is available from Tal-Ko Racing at £4.50. Copies of the individual chassis fiche are also availablefrom the MSA at £22.B3.9 ABkC Rules (which must be read in conjunction with the above).B3.9.1 Chassis In the case of any dispute relating to chassis legality the onus is on thecompetitor.B3.9.2 Eligibility Judge of Fact The ABkC championships judge of fact on the legality of a FormulaTKM engine will be Mr P. A. Klaassen, or other persons who from time to time may be appointed inwriting by the ABkC.B3.9.3 Driver Restrictions There are no restrictions on drivers racing in this formula but clubs arepermitted to introduce restrictions in their individual supplementary regulations, for example: ‘Driverswho are competing in the current Super One Series in Formula A, ICA or Formula 100 National arenot permitted to race in this class in National A events.’• It is expressly underlined that all seniors should race together and that all senior engines

should be upgraded to the Extreme specification over the course of time. However in theshort term clubs may if they wish split grids accordingly.

B4.0 Group Junior, direct driveB4.1 Class Formula Rotax Mini Max

Affiliation Commercial: J.A.G. Engineering and ABkC B4.2 Introduction: A restricted version of the FR 125 Junior Max to give the younger driver theopportunity to race Rotax Max.B4.3 Chassis: Any chassis conforming to MSA Direct Drive Regulations.B4.4 Engine: The only engine permitted in this class is the Rotax FR125 JUNIOR MAX withrestrictors. The Junior Max adheres to the Senior Rotax FR l25 Max fiche plus extensions for theJunior including the cylinder. The cylinder is to be of non-Power Valve type. The engine is a singlecylinder, liquid cooled, reed valve two stroke. All engines must be sealed between cylinder,crankcases, cylinder head and the reed valve block with an official seal to prevent modification. Allengines are issued with an official identity card. It is the competitor’s responsibility to ensure thenumbers inscribed on the engine and seal correspond with those on the identity card at all times.Only authorised dealers will be issued with seals for use during maintenance of the engines. Theidentity card must be filled in and signed by an authorised dealer. The engine must be presented atscrutineering with the official class seal intact and the identity card lodged with the scrutineer. Thecard must be collected by the competitor at the end of the race meeting. (At club race meetings it isnot compulsory for competitor’s to lodge the identity card with the scrutineers. The identity card mustbe available for inspection by the scrutineers at any time during the race meeting).Should a seal become damaged, loose or lost during racing it must be reported to the meeting’sscrutineer before leaving parc ferme. To allow the competitor to continue racing the scrutineer may athis discretion re-seal the engine with an official MSA seal. The new seal No. Must be entered in theengine’s identity card and signed by the scrutineer. The engine must be taken to an official dealer withMSA seal intact to be re-sealed with an official class seal before competing at the next race meeting.B4.4.1 Modifications: The engine and its ancillaries may not be modified in any way unlessotherwise indicated by these regulations or the official MSA fiche. UNLESS IT STATES THAT YOU CAN DO IT YOU CANNOT!!!The engine must be raced in standard form as manufactured and supplied by Rotax unless otherwisestated. Filing, grinding, polishing, surface treating, machining or lightening of any component isforbidden unless otherwise stated. The addition of material to any component is not allowed unless

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otherwise stated. All parts used in or on this engine must be of original manufacture or source assupplied by Rotax except where expressly allowed. The engine is to be used with air box, carburettor,fuel pump, radiator, wiring loom, ignition system and exhaust system as supplied by Rotax unlessotherwise stated. Position and method of mounting the battery, wiring loom, exhaust system are freeproviding they are securely fixed to the satisfaction of the meeting’s scrutineers and in accordancewith MSA Regulations. Filing of crankcase to allow easy fitting of water connection is allowed. Fittingof helicoils and inserts to repair damaged threads is allowed, except for the spark plug thread in thecylinder head insert, providing such repairs are not used to derive any benefit other than rectificationof damage. The use of thermal barrier coatings/ceramic coatings on or in the engine or exhaustsystem is not allowed. Replacement connectors to repair wiring loom are permitted. Repairs to startermotor are also allowed.B4.4.1.1 Restrictors Exhaust restrictor must be in place at all times. Restrictor must be as suppliedby J.A.G. and comply with the official fiche, no modifications allowed. Exhaust flange restrictor, 20.3mm maximum round bore, all exhaust gases must pass through this restrictor. B4.4.2 Carburettor: Dell’orto VHSB 34 QD or QS.All parts of the carburettor including the body are to be unmodified and run as supplied by Rotax. Thecarburettor must have VHSB 34 (cast in body) QD or QS (stamped on body). All parts must complywith the official fiche. The only adjustments allowed are the main jet, external air screw, throttle stopadjustment screw, and needle position on the five grooves provided. Needle jet atomiser FN 266.Choke jet 60.Idle jet 30, idle jet emulsion tube 30. Needle K27 or K98 (Rotax Part No 261191). Floatneedle valve 150. Slide 40. Floats 5.2gr. Atomiser Type 2. The venturi must have 34 cast and 12.5 or8.5 stamped on the top of the venturi. Throttle cable and adjusters are free. It is permitted to use asingle length of vent tube looped across the two air vents of the carburettor with a hole or slot cut inthe side of the vent tube at the top of the loop.B4.4.3 Fuel Pump: Only Mikuni – Fuel Pump DF 44-210 Part No.994482 may be used. Fuelpump must be fitted to the bottom of the standard air box bracket. Only a single length of pulse tubefrom crankcase connector to fuel pump may be used. Only a single length of fuel line from fuel pumpto carburettor may be used. It is permitted to use an in-line fuel filter as supplied by Rotax betweenthe fuel tank and fuel pump. An Internal fuel tank filter is also permitted. No restrictors, fuel returns oradditional reservoirs are permitted. B4.4.4 Intake Silencer: The air box supplied with the engine must be unmodified except for thebottom half of the air box where the lug support ribs, on the longitudinal side, may be removed toallow the fitting of the air box support bracket. The air box must be used with its filter in place.a) In dry race conditions the air box MUST be positioned with inlet trumpets to the bottom of the box.The air box must be securely fitted in a manner to prevent rotation.b) In wet conditions i.e. only when declared a wet meeting by the Clerk of the Course the air box maybe fitted in any positionc) If the meeting is declared open: Kart on wet tyres – position free; Kart on Dry tyres – fix as dry d) An 8mm diameter hole is permitted in the bottom airbox half.B4.4.5 Exhaust System: Only TYPE B Part No.273072 exhaust may be used. The exhaustsystem and silencer may not be modified in any way except for the pop rivets securing the silencerend plate may be replaced with screws. The use of a jubilee clip to secure the end plate pop rivets orscrews is allowed. It is permitted to paint the exhaust system with black paint and to replace thesound absorption material to retain its efficiency. The use of any other coating or plating is notallowed. It is permitted to make minor repairs by welding or braising to the exhaust system providingthere are no alterations to the original dimensions.B4.4.6 Radiator: The radiator must be fitted to the right hand side of the engine using standardhoses and connections as supplied by Rotax. Engines using the thermostat cooling system must usethe system in its entirety which comprises of thermostat head cover, radiator, radiator cap, radiatorhoses, steel crankcase water hose connecting tube and radiator bracket. It is permitted to use thethermostat cooling system with or without the thermostat in place. The use of alternative hose clipsand screw fixings are permitted. Blanking of the radiator is free providing it does not necessitate themodification of the original components other than simple attachment. Minor repairs to the radiatorare allowed.B4.4.7 Ignition unit: DENSO digital battery ignition, variable timing with no adjustment. Ignition

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coil must have “129000-“ and “DENSO” moulded on the case. The ignition coil must have three pinconnection. The ignition coil must be mounted by means of two original rubber mounting blocks orequivalent to the gearbox cover. In the case of chassis component interference with the originalmounting position it is permitted to relocate the ignition coil by the use of an extension bracket. Theextension bracket must be attached to the original gearbox cover mounting holes. The ignition coilmust be mounted by means of two original rubber mounting blocks or equivalent. Spark plug capmust be marked with “NGK TB05EMA”. Ignition switch can be either On-Off type, part number265592, or Automatic fuse type, part number 265590.B4.4.8 Spark plug: The only spark plugs permitted are as listed and must be unmodified withsealing washer in place. The list of spark plugs is as follows:-Denso IW24, IW27, IW29, IW31.Champion QN84, QN86.NGK BR8 EG, BR9 EG, BR10 EG, B8 EG, B9 EG, B10 EG, B8 EGV, B9 EGV, B10 EGV, BR8 EIX,BR9 EIX, BR10 EIX.Other makes/types may be added to this list by J.A.G.; details will be published in official bulletin.B4.5 Transmission: Direct from the engine to the rear axle via a single length of chain. Theclutch supplied with the engine must be used with its standard components. The clutch must engageat a maximum engine speed of 3000 rpm. [See N 15.3.3]B4.6 Brakes: Hydraulic disc brake operating on rear wheels only.B4.7 Tyres: Dry: VEGA SL8 Marked ‘J.A.G.’ 10 x 4.50-5 front, 11 x 7.10-5 rear

Wet: VEGA W2 Marked ‘J.A.G.’ 10 x 4.20-5 front, 11 x B4.00-5 rearB4.8 General An ignition kill switch must be fitted and must be identified with a blue triangle toassist marshals in the event of an incident.B4.8.1 Retail price: Not applicableB4.8.2 Non-Technical items: The use of alternative fasteners, washers, hose clips, fuel andpulse line is allowed unless otherwise specified. The use of additional and alternative earth straps isallowed. The use of additional air box support brackets, radiator support brackets, coil-mountingbrackets, chain and clutch guards is allowed providing the fitting of these does not necessitatemodification of the original components. B4.8.3 Weight: Minimum of 135 kg including driver at all times.B4.8.4 Number Plates: Yellow with black numbersB4.8.5 Age: 11th birthday to 31st December of the year of 16th birthday.B4.9 Data loggingData logging is permitted, data logging systems with or without memory may be used. It is onlypermitted to take readings of engine rpm engine water temperature, speed of 1 wheel, an X/Yaccelerometer, lap times and split lap times. The engine water temperature sensor may only be fittedin the position provided in the cylinder head cover for this attachment. The rpm may only be recordedvia a sensor on the HT lead to sense spark plug pulses. The HT lead must remain a single length fromignition coil to spark plug cap. The fitting of these sensors is only permitted providing there is nomodification to the original engine components.

B5.0 Group Junior (Direct Drive)B5.1 Class Honda Junior

Affiliation Ratpro & ABkCB5.2 Introduction. Budget junior class. This class is included in the Super Two ABkC FourStroke Kart Championship. The engine is homologated with the MSA. Full details from Ratpro at 10Island Close, Staines, Middlesex TW18 4YZ. www.ratpro.co.uk. [email protected] The use of a rev-counter and data logging is permitted.B5.3 Chassis. Wheelbase to be between 98 - 108cms. The rear axle is to be constructed from30mm nominal diameter solid or hollow magnetic material. An extended width rear bumper ismandatory. The bumper is to be constructed from a minimum 25mm nominal diameter 14g magneticsteel tube. The bumper must form an extended loop of 180mm ±10mm centres with the bottom loopcentre 60mm ±10mm from the ground in dry configuration. The horizontal rails must be wider thanthe outer chassis rails. The bumper must be supported in a minimum of two places from the chassisand be of such a construction to withstand substantial impact. In side view the bumper will be in the

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vertical plane. The overall width of the bumper must not exceed the rear width of the kart at any time.The measurement to be taken at the outside of the rear wheel or tyre, which ever is the greater andmust cover a minimum of 50% of each rear wheel/tyre at all times. Adjustable width bumpers are notpermitted. B5.3.1 Side Pods. The fitting of side pods is mandatory and they must comply with current MSAside pod regulations but with the following additional provision. Side pods may be cut away on theirinner, upper and lower surfaces by the minimum amount to clear an engine and its attachments. Theupper and lower surfaces may be cut away up to a maximum of half the width of the surface.B5.4 Engine. Twin Honda engines of the GX160T1 QHQ4 or GX160UT1 QHQ4 designation are to be fitted. Clubsthat wish to permit the use of obsolete GX160K1 engines should apply to the MSA under regulationN1.3 for permission. All engines types must comply with these regulations and the Ratpro HondaGX160 Technical Regulations Version 1 of January 2005 which are available on the Ratpro websitewww.ratpro.co.uk and from Ratpro at 10 Island Close, Staines, TW18 4YZ. B5.4.10 Combustion Volume. The combustion volume will be increased by fitting three standard Honda GX160 cylinder headgaskets. These gaskets must be standard unmodified and each one will at all times have a minimumthickness at all points of 1mm.B5.5 Transmission. A dry air cooled centrifugal clutch which cannot be adjusted in position, ofNoram, Horstman, Maxtorque 4,000 or Premier manufacture is to be used to transmit drive withmaximum engagement speed of no more than 2500 rpm engine speed. Drive is to be by 219 chain orby belt. Drive protection must be according to current MSA regulations. Chain protectors may beattached to the sprockets.B5.6 Brakes. One mechanical/hydraulic disk brake to be fitted to the rear axle and the disc tobe made of metal only. B5.7 Tyres. Tyres are as follows:-SLICKS: Dunlop SL1 Front 10 x 4.5 x 5, Rear 11 x 7.1 x 5.WETS: Dunlop KT3 Front 10 x 3.6 x 5, Rear 11 x 6.0 x 5B5.8 GeneralB5.8.1 Retail price. Not applicableB5.8.2 Weight. Minimum weight of the kart inclusive of engine, driver and engine oils to be notless than 152kgs.B5.8.3 Plates. Number plates are to be blue with white numbers. (See Honda JuniorHeavyweight)B5.8.4 Age. 11 to 16 years old. A Junior may transfer to a Senior class at any time during theyear of the sixteenth birthday. Having moved into a Senior class he/she may not revert to Junior.B5.8.5 Honda will not accept warranty claims on engines used in any practice or racing capacity.

B6.0 Group JuniorB6.1 Class Junior Blue

Affiliation NKRA B6.2 Introduction. To Provide a ‘box stock’ economy/Club Class using 100cc liquid cooledTaG racing engines allowing youngsters to graduate from Cadets into 100cc racing. Speed and tyresare restricted to cater for the younger driver. Weight variations are incorporated to facilitate as closelyas possible light and heavy youngsters in equal competition. The class will also allow for a directtransition into the Senior section with minimum mechanical equipment changes as the Juniors comeof age. The control of the class regulations rest with the NKRA.B6.3 Chassis. Must conform to MSA direct-drive regulations. Rear axle 40mm maximum. B6.4 Engine. IAME Lynx Tabor Tag, 2 stroke, liquid cooled 100cc engine. This engine mustconform to the manufacturers/UK importers specifications as lodged and agreed with the MSA. Itsfunction must remain in the condition as intended and designed. No other modifications or alterationsare permitted except where expressly allowed. The engine must be raced in standard form asmanufactured by IAME. Filing, grinding, polishing, surface treating, machining or lightening of anycomponent is forbidden unless otherwise stated. The addition of material to any component is notallowed unless otherwise stated. All parts used in or on this engine must be of original manufacture or

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source except where expressly allowed. The following parts must be marked and be sequentialnumbered by the Importer (Tabor) power box 5A, cylinder, crank case, clutch, clutch drum, ignition,piston. The engine is to be used with airbox, carburettor, water pump, radiator, wiring loom, ignitionsystem and exhaust system as supplied by the manufacturer. The ignition/alternator unit must be inoperation at all times and the timing must be within the preset parameters. The battery must be fittedwithin the metal enclosure as supplied and mounted on the left hand chassis rail using originalspecification brackets/clamps. After fitment no more than 50% of the battery box may protrudeoutside of the outer chassis side rail. Starting system must be on-board system as supplied; noadditional starting equipment can be fitted or used Engine eligibility will be determined by the NKRAEligibility Scrutineer with support and advice from the Importer (Tabor) Only the following plugs may be used. Bosch WCS; Champion N, NG, NR; Densso WEN, WEPT,WES-GU, Motacraft AG, AGX. NGK; BEG BEV, BEGV, BEGP BREG. Heat range is free.The radiator must be fitted to the left hand side of the kart using standard hoses and connections.Fitting of helicoils and inserts to repair damaged threads is allowed, providing such repairs are notused to derive any benefit other than rectification of damage. The use of thermal barriercoatings/ceramic coatings on or in the engine or exhaust system is not allowed. Blanking of theradiator is free providing it does not necessitate modification of the original components other than bysimple attachment. Minor repairs to the radiator are allowed. UNLESS IT STATES THAT YOU CAN DO IT YOU CANNOT !!B6.4.1 Carburettor. Tillotson 360 unmodified. No added/extra components of any descriptionthat could affect airflow between the mouth of the carburettor and the reed block may be used.The inlet spring must be original, unmodified and of the same length. Gasket set DG 1HL, Inlet setseither RK116HL or RK 120HL. An official restrictor from the NKRA list must be used, see below. B6.5 Tyres. Slick: Dry: LeCont LH TAB

Wet: Maxxis WT4 and LeCont W TAB B6.6 Weight. NKRA specification, colour coded, restrictor sizes will apply for the followingminimum weights

128kg Silver TAB 2138kg (driver min. 45kg) Purple TAB 2148kg (driver min. 55kg) Green TAB 2158kg (driver min. 65kg) Red TAB 2

Driver minimum weights are race weight with full racewear and helmet.B6.7 Number plates. White with black numbers.B6.8 Age. From 11th Birthday to 31st Dec of the year of 16th BirthdayB6.9 Retail Price. Maximum retail price for engine including carburettor and exhaust is £850.plus VAT.B6.10 General.B6.10.1 Equipment. While taking part in racing or official practice only a revolution counter, laptimer, or temperature gauge may be fitted. All equipment designed for measuring data that can betransmitted either mechanically or electronically to another receiver either during or after motion isprohibited. This applies whether the capacity to do so has been removed or not. All sensors andrelated wiring and brackets relating to such equipment must be removed from the kart for racing andofficial practice. The exception to this is where officially sanctioned cameras and/or transpondersand/or dummy camera units are required by the organisers of the race meeting. B6.10.2 Engines. The NKRA reserves the right to amend restrictor sizes should performancerequire adjustment on safety grounds and to preserve comparable kart performance. The NKRA alsoreserves the right to accept other engine types into this class subject to their meeting technical andperformance criteria set by the NKRA and within class stability criteria.

B8.0 Group Junior (Gearbox)B8.1 Class Junior Gearbox

Affiliation MSA and ABkC B8.2 Introduction: This class is part of the Super 4 and Stars of Tomorrow ChampionshipsNew engines will be considered for registration periodically. The next opportunity is expected to beduring 2007 for use from 1.1.2008. Tuning rules, restrictors and carburettor sizes may be varied

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during the year to ensure that all registered engines are approximately equal in performance. Officialcopies of the registration documents can be purchased from the MSA Sales Department.B8.3 Chassis. 2 or 3 pedal with minimum wheelbase of 104cms and having 4 wheel brakingupon 5 inch diameter wheels only. Bodywork shall conform to 100cc direct drive type to MSA andABkC regulations. Nose cones are compulsory but must conform to 2002 or later CIK dimensions, shovel or wedgetypes are not permitted. B8.4 Engine. Engines must be registered in writing with the MSA. The MSA and ABkC reservethe right to refuse registration of an engine type or permit registration with additional modifications tothe standard engine. The only engines currently registered for the class are the TM 85 MC and theHonda CR80.B8.4.1 Engine Tuning Regulations: Modifications to the engine are allowed, providing thefollowing are not varied:a) Stroke.b) Bore (outside maximum limits 85cc).c) All components must be original engine manufacturer parts.d) Number of transfer passages and inlet ports in the cylinder and crankcasee) Number of exhaust ports and passages.f) External appearance of the engine other than carburettor, engine mounting points. (The addition of afuel pulse pump adapter is permitted)g) ~ Deletedh) All systems of injection and/or spraying of products other than permitted fuel are forbidden.i) No form of electronic carburation management.j) Ignition system must be on the manufacturers parts list, with no modification, no programmableignition or coils and no additional retarder box. k) Cylinder head volume must be a minimum of 7.5cc using the CIK specification plug insert andmeasured as per the CIK method described in CIK Annuaire Appendix 1. Ambient temperature isdefined as any temperature between -5°C and +50°C. Spark plugs must be un-modified and the threadmust not protrude into the combustion chamber when fully tightened. Modification to the spark plugthread is not permitted except for helicoil repair so long as the repair is to the full depth of the thread.l) Maximum total exhaust port opening 195 degs.B8.4.2 Power valve is to be operational if fitted on the registered engine, or otherwise asregistration but no changes are permitted to its operation or the materials. B8.4.3 Carburettor. The carburettor must be of the same make, type and model number asregistered with the engine. No modifications are permitted other than changing the jets, atomisertube, needle and cut-off valve with original manufacturer’s parts. For the Kiehin carburettor, it is alsopermitted to change the cut-off valve with a non-standard part by following the procedure in Appendix5. The carburettor specified for the TM85MC is the Mikuni 32mm (maximum bore) and for the Hondathe Kiehin 28mm (maximum bore). The mandatory airbox is the 100cc CIK type as per MSA KartYearbook Annex 3 1.1B8.4.4 Exhaust. As per Appendix 3. Exhaust muffler minimum dimensions are 100mm diameter,380 mm length, 38mm bore and 300 mm feed pipe. The exhaust must be used as supplied andregistered with the engine. For the Honda engine the only exhaust to be used is the HGS type TR02.If the exhaust type is not from the original manufacturer an identification mark will be put on by thesupplier or designated by the MSA and ABkC, the exhaust conforming in all respects with theregistration document. The suppliers who register engines have the right to make one change duringthe year to a quieter exhaust type. This must be agreed with the MSA and ABkC and be registeredbefore use.B8.5 Transmission. Gearbox ratios (6-speed) are as registered with the standard engine, andmay not be varied. B8.6 Brakes. In accordance with N 14.7.B8.7 Tyres Slick: Burris SS-55. Front 10 x 5 x 5, Rear 11 x 7 x 5.

Wet: Dunlop KT10 Front 10 x 4.50 x 5, Rear 11 x 6.50 x 5.It is permitted to use the 2005 KT8 at club meetings during 2006.B8.8 Price. The engine maximum retail price to include complete engine, water pump,

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carburettor, ignition, exhaust, silencer and engine cradle mount (for 100cc type chassis) is£1575 plus vat.B8.9 Weight. Minimum race weight is 155 kg including driver.B8.10 Plates. Red with white numbersB8.11 Age. From 13th birthday to 31st December in year of 16th birthday. B8.12 General.B8.12.1 Race Procedure. Standing or rolling starts (SRs must define).

B9.0 Group Senior / JuniorB9.1 Class Formula TKM 4-stroke

Affiliation Commercial, Tal-Ko/ABkCB9.2 Introduction. 4-stroke class providing close and cost effective racing with sealed highperformance engines.B9.3 Chassis. Any make of chassis conforming to MSA regulations made since 1-1-1991.Must have been homologated/registered by either the MSA or CIK or a registered Formula TKM4-stroke design. ProKarts designed to use two Honda engines may be used providing they meet withother class criteria. They must remain capable of taking two Honda engines with the seat in nominallycentral position.B9.3.1 Bodywork. Use of sidepods and front fairing is mandatory. Type and style free but mustconform to MSA Technical Regulations. Note that where a kart is fitted with a traditional front bumperincorporating two vertical front uprights it is permitted to make use of CIK front fairings with alternativefixing method. In this case, as long as the two vertical uprights remain in place, the requirement for analuminium or steel securing block as per MSA rule 14.13.2 is waived. The fairing may be attached tothe kart by any safe and secure method in two places, not necessarily the CIK type clips. The radiatorwater catch tank may be fitted in engine sidepod or any other position. Sidepods may incorporatesuitable holes for starter shaft and radiator catch tank fitment. Their ends may be sealed or open.Latest type CIK homologated karts and other karts registered for the class may make use of 2003style new type CIK pods and bodywork providing they meet MSA regulations.B9.3.2 Bumpers. To MSA specification. Rear bumpers may additionally be fitted with a verticalprotection loop for the carburettor/airbox in which case the loop must be welded/brazed to thebumper and not exceed a height of 35 cm from the ground.B9.3.3 Materials. The following parts are specifically prohibited: Components made from Kevlar,Carbon Fibre, Titanium or other similar exotic materials, other than for the seat or floor tray materialwhich is optional. The use of plastic or similar materials for components such as wheels, wheelhubs/bosses, sprocket and brake disc carriers is expressly forbidden. Magnesium and Electron ispermitted. On grounds of safety the use of aluminium nuts and bolts is prohibited throughout thewhole of the kart including the engine. The only exception is the engine oil drain plug bolt which ismade from aluminium. B9.3.4 Other. Front and rear ride heights may be adjustable. Torsion bars and adjustmentspermitted. Drivers may make use of tank tape, cable ties, thin wire or throttle cable type bowdencable in ensuring that items such as exhaust, bumpers, electrical wiring, chain guard, etc do notcome off during the course of racing. The item used must only be there for secondary security andreliability purposes. B9.3.5 Rear Axle. The rear axle must be of parallel magnetic steel, 50mm maximum nominaldiameter. The axle can be either solid or hollow. It must be supported in two or three bearings. Quickrelease and/or cassette type axle bearing assemblies may be used. B9.3.6 Steering. Ackerman steering with double mounts on the centre steering column bush fortrack rods permitted. Nylon type track rod links of suitable strength may be used. Adjustable frontcastor and camber permitted. Multi-point stub axle track-rod arm bolt fixings permitted. Rackoperated steering not permitted. All karts must have the steering column mounted in such a way thateven if the bottom retaining bolt/nut is removed it cannot pull free from its lower bearing. B9.3.7 Seat. Seat type is free including material. Use of commercially available and manufacturedvariable rigidity adjustment systems for seats is permitted subject to the following criteria. The devicemust be mounted to the seat itself and must not be attached to or have contact with the seat

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mounting points or chassis. It is not permitted to use ‘home constructed’ non commercially availabletorsional adjustments. Additional bolt on seat stays/mountings are permitted, position free. B9.3.8 Fuel Tank. The fuel tank must be floor tray mounted beneath the steering column,forward of the driver, type free. A fuel filter is allowed in the fuel tank and/or an in-line filter. Maximumfuel tank capacity 9.25 litres. A fuel overflow catch tank must be fitted.B9.4 Engine. TKM K4S 4-stroke. 200cc. Engine must be fitted with the official TKM numberedseal as fitted by Tal-Ko or any other nominated fitter. The engine must be raced in as supplied andmanufactured form with no modifications or changes to the original sealed specification other thanthose detailed in these regulations. It is stressed that this is a class with no engine modificationspermitted. Any attempt to modify the engine in any way not specifically authorised here renders itoutside these regulations.Only Tal-Ko or nominated dealers are authorised to strip, inspect and seal engines. Every engine mustcarry an official anodised TKM numbered seal attached to the cylinder head and cam cover nuts.f this seal is broken the engine cannot be raced and must be returned to Tal-Ko for checking andre-sealing. The only persons allowed to strip and validate an engine for the purposes of checking itscompliance with regulations is Tal-Ko in conjunction with an eligibility scrutineer. In such casesTal-Ko’s signed ruling will be final.B9.4.1 Carburettor. Dellorto PHBH28 (BS) TKM logo marked. No modifications permittedincluding any filing, grinding, polishing, etc. This includes the bolt on carb flange for the induction box.Note all carbs must now be fitted with TKM looped overflow system.Carb system mandatory settings (Junior and Senior): Main jet any available between and including116-130. Pilot jet 35-45. Atomiser 268T. Float assembly 9010.2. Needle valve 150. Slide 40. Chokejet 60. Needle X6 with circlip position free. B9.4.2 Fuel system. Mikuni pulse pump DF 44-211-D. As supplied, no modifications.Recommended mounting on TKM provided fitting plate fixed to rear of seat. Return fuel pipe mustinclude the return jet 70.B9.4.3 Restrictors – Junior Class. Must include TKM manufactured and logo marked goldanodised carb inlet restrictor in unmodified form with a 19mm maximum diameter round bore inletsize. No polishing or changes permitted. Gold anodising must always be in tact.B9.4.4 Noise Box. R&R K4S type TKM logo marked as supplied by Tal-Ko with no modifications.Both induction filters must be used. Cable ties can be used to secondary secure the filters. Must bemounted on a support bracket. Both induction tubes to have standard 29mm nominal insidediameter.B9.4.5 Breather. The engine oil breather system must be used as supplied with no modificationsand mounted on the TKM provided fitting plate to the rear of the seat. The use of a cable tie or othersecure means is permitted to attach the plastic oil retention bottle. B9.4.6 Ignition. PVL Digital System complete with red coil 500159 with standard programmedK4S ignition curve and rev limiter. Must be as supplied and stamped and marked with the official TKMlogo markings. Stator marked with Ident-Nr 1035. Rotor must include TKM logo. It is mandatory touse the PVL black spark plug cap 401 222 with 5k resistor and HT lead as supplied with newengines. Maximum permitted ignition timing 7.45mm BTDC. No modifications permitted to completeignition system throughout including any re-mapping. It is permitted to repair broken wires providingthe original type terminals are used. An effective and working ignition on/off switch must be fitted tothe kart and clearly marked in the off position; position free. B9.4.7 Cooling. Water cooled system. Radiator, water pump, hoses, brackets etc must remainas supplied and unmodified. Use of either straight or offset radiator position permitted using optionalTKM brackets and pipes. It is permitted to wrap the cooling hoses with heat protective tape or similarand to use tank tape or similar or an adjustable blind to mask part of the radiator in order to controloperating temperature. Anti-freeze or inhibitor mixed with water should be used in cooling system.Water pump with aluminium impeller must be used unmodified as supplied. Radiator must be assupplied by Tal-Ko mounted in standard position with TKM logo stamped supplied mountingbrackets. Additional mountings may be attached to radiator and associated components to securecatch tank pipes, blinds, etc. Standard radiators as supplied from Tal-Ko may have the top mountingbrackets either welded or riveted in place. This is due to a change in manufacturing method. Both areacceptable. It is permitted to carry out external repairs including welding/brazing to the radiator and

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its brackets to repair damage. It is not permitted to replace the radiator core. The use of the largerEnduro type Tal-Ko supplied radiator with its associated TKM brackets and pipes is also permitted.This radiator and its brackets must have TKM logo.Note that the temperature sensor must be fitted in the location hole provided within the engine andmust not be fitted within any hose or other section of the cooling system.B9.4.8 Exhaust. Only the compete TKM manufactured and supplied exhaust system permittedwith no modifications. It is permitted to paint the TKM manufactured exhaust silencer provided thatonly black paint is used and that the original TKM logo is still visible. It is expressly prohibited to useany other coating or plating or to use any colour other than black. Note two types of exhaust manifoldand exhaust available to suit individual fitments. TKM logo on exhaust body and chrome end must bepresent. The only exhaust end can permitted is that provided by Tal-Ko and marked with the TKMlogo.B9.4.9 Fuel. Unleaded to MSA specification. Super unleaded may be used, LRP must not.B9.4.10 Spark plug. Only permitted plugs :- Denso U27ES-NZU, Denso U31ES-NZU andU34ES-NZU B9.4.11 Lubrication. Oil circulation pump, no modifications permitted. B9.4.12 Starter. By remote electric starter any make (Coleman heavy duty recommended), or byTKM on-board system as supplied.B9.5 Transmission. The drive must be clutch direct, i.e. the clutch sprocket and rear axlesprocket are connected only by a single length of chain. No belt drive, reduction gears, etc, permitted.The only clutch engine sprockets permitted are 12 or 13 tooth, TKM manufactured and marked withTKM logo. Engine must be fitted with the mandatory Formula TKM 4-stroke dry clutch. This mustcarry the Formula TKM markings and be used in unmodified form as manufactured and supplied. TheTKM supplied and logo marked clutch protection guard must also be used.B9.6 Brakes. Brakes must be hydraulic operating on the rear wheels only - no ABS or similarpulsing systems or on-board adjustment operated by the driver while in motion. The brake disc mustbe made from cast iron or steel but is otherwise free. For the purposes of safety it is mandatory for allkarts to make use of a dual connection between the brake pedal and master cylinder. The primeconnection may be either solid or cable operated, with a secondary safety cable set slightly looser toact as a back up in the case of failure. Many new karts will come with such a fitment as standard towhich no modifications to the homologated brake system may be made. On older karts minimal safealteration of the brake system to accommodate these dual connections will be permitted.B9.7 Wheels & TyresJuniors – The only dry weather slick tyres permitted are Maxxis green label with the words FormulaTKM moulded in their sidewalls. They must not be modified in any way including hand or machinecutting. Tyre sizes/types as follows:Dry Front 10x4.50-5 (SLC), Rear 11x7.10-5 (SLC)Wet Front 10x4.50-5 Formula TKM, Rear 11x6.00-5 Formula TKMSeniors – As above except that for dry weather Maxxis red label slick tyres must be used with MaxxisTKM marked on the sidewalls in red. Heating of tyres by any artificial method, or their treatment byany chemical substance, is prohibited. Tyre pressures are free.Wheels are free but must not be made of plastic type material. Wheels must be of onemoulding/casting. The use of wheels which have been cut and joined to increase or reduce width isexpressly prohibited. It is permitted to use wheel balance weights affixed to the wheels. Maximumwheel width should be a nominal 122mm front and 210mm rear as measured across the inside edgeof the beads. Maximum permitted width across the outer edges of the rims to be 131mm at the frontand 217mm at the rear.B9.8 Retail Price. Engine £1449 plus VAT. Chassis open price.B9.9 Weight. On completion of any part of the eventJunior – min 140kg with driver, Senior – min 162kg with driver, Senior Heavy – 175kg with driver.B9.10 Plates/Numbers.Junior TKM – blue with yellow numbers, Senior TKM – red with yellow numbers, Senior Heavy – redwith yellow numbers and yellow flash.

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B9.11 Ages.Junior – From 11th birthday to 31st December of calendar year in which 16th birthdayfalls.Senior – The Class is open to any driver aged 16 or over.

A Junior may transfer to this senior class at any time during the year that he/she achieves thesixteenth birthday. Having moved into the senior class he/she may not revert to a junior class.B9.12 General. Only the TKM K4S name may be used under the heading “engine” in eventprogrammes. No other names permitted.B9.12.1 Data Logging. While taking part in racing or official practice a revolution counter, datalogging, timer and temperature sensor equipment may be used. A transmitter may be used whichsends/receives one short burst of data from a kart to a land-based receiver once each lap. All otherequipment used for measuring data or for transmitting a signal to another receiver is prohibited. Theonly exception to this rule applies to the fitting of officially sanctioned cameras and other recordingdevices and to transponders and other equipment required as part of the organisers requirements forthat race meeting.B9.12.2 Ballast. It is permitted to add weight to the kart in order to meet minimum weightrequirements provided that MSA regulations are adhered to. Weights must only be attached within theperiphery of the main kart frame and must not be attached to the sidepods and/or front nosecone. Itis permitted to add weights to the seat but strongly recommended not to add more than a total of2kg weight to the floor tray. No one single piece of ballast must be more than 5kg. All weights to befixed using a minimum of two mechanical fixings – ie bolts.B9.12.3 Warm Up. Organisers should allow a minimum of 5 minutes for the engines to warm upbefore being used for racing or practice. When the engine is running a driver must be in the seat at alltimes.B9.12.4 Compliance. The organisers reserve the right to take away an engine complete withcarburettor, noise box, exhaust system, clutch, etc sealed by an MSA scrutineer for the purposes ofpower testing on the manufacturer's approved dynamometer. The competitor and an MSA scrutineerto be invited for such testing and any subsequent stripdown, which is carried out at the risk of thecompetitor. In the event of any dispute the regulations and fiche as published within the officialFormula TKM 4-stroke Regulations Guide 2006 together with any appropriate Technical Bulletins willbe taken as the definitive documents. It is the responsibility of each and every competitor to obtainthese regulations and fully implement them. Ignorance of any rule will not be a defence.B9.12.5 Sealing Only Tal-Ko or nominated dealers are authorised to strip, inspect and sealengines. Every engine must carry an official anodised TKM numbered seal attached to the cylinderhead and cam cover nuts. If this seal is broken the engine cannot be raced and must be returned toTal-Ko for checking and re-sealing.

C1.0 Group Senior (Direct Drive)C1.1 Class Formula A

Affiliation CIK/MSAC1.2 Introduction. This Class is running as part of the Super One Series Championship, it isthe MSA British Championship for senior 100cc drivers. The class mimics the CIK European class inall respects except for tyres where a single tyre is selected from the CIK list for use in the class andwith the option to use liquid cooled engines in order to reduce noise levels. The top 100cc class inBritish kart racing Formula A offers the highest level of power and handling but as such this class isthe most expensive class in which to take part. All CIK references refer to the current CIK Yearbookunless otherwise specified.Liquid cooled versions of homologated engines prior to the 2004 homologation will be permitted inthe UK provided the engine variant is registered with the MSA or homologated with the CIK.C1.3 Chassis. C1.3.1 Must comply with MSA Safety and Technical Regulations, Yearbook Section N. C1.3.2 CIK registered chassis from manufacturers who have a chassis homologated with the CIKfor Intercontinental A.C1.3.3 Bodywork. Side pods mandatory to MSA/CIK technical regulations, CIK homologated.C1.3.4 Front fairing mandatory to MSA/CIK technical regulations, CIK homologated.

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Documents

Gold Cover 2006 - emamc.org.uk