CONCEPT AND ADVANTAGES ----- P.2 KEY FEATURES ... · PDF fileCOLOUR(S) ... AMA factory racer-spec system gives riders an edge when starting in ... controller, mounting equipment and

CONCEPT AND ADVANTAGES

1

2015 MODEL INFORMATION

MODEL NAME

MARKETING CODE

KX450FKX450F

Version: 1 Jul 2014

CONCEPT AND ADVANTAGES ----- P.2

KEY FEATURES --------------------- P.4

HARD-HITTING FUEL-INJECTED POWER ---------- P.5

FACTORY-STYLE CHASSIS COMPONENTS AND TUNING ---- P.13

ADDITIONAL FEATURES --------- P.24

COLOUR(S) ------------------------ P.25

SPECIFICATIONS ------------------ P.26


2

CHAMPIONPERFORMANCEKX design philosophy is simple: put mid-level to expert riders on the top step of the podium. This philosophy has not changed since the creation of the KX brand over 40 years ago. With 32 AMA SX titles to its credit, the most of any manufacturer, KX has a proven record of powering champions. Adding to its highly acclaimed engine and chassis performance, numerous industry firsts and advanced technology, fine-tuning for 2015 makes the new model the most potent KX450F yet.


32 0 1 5 M Y K X 4 5 0 F M O D E L I N F O R M A T I O N

NEW

Racing Dominance

2011 / 2012 / 2013 / 2014AMA SX Champion

2011 / 2013AMA MX Champion

Easy access to 3 engine maps

Easy engine tuning: DFI Setting Data Selection

AMA factory racer-spec system gives riders an edge when starting in low-grip conditions.

Holeshot Advantage: Launch Control Mode

Larger front disc: enhanced braking power and controllability

New design: stylish appearance (F/R)

Oversized new petal disc

Dominant engine performance at all rpm

Race-based performance: bridged-box bottom piston

Same design used by AMA factory racers

Function divided: Right: (Pneumatic) Spring Left: Damping Assembly

Large ø49 mm inner tubes contribute to great fork rigidity

Ultra-low friction contributes to extremely smooth action

Lightweight constructionEasy to adjust

Wide setting range

Advanced suspension technology: SFF-Air TAC (Triple Air Chamber)

Precise engine tuning: Factory-spec KX FI Calibration Kit (option)

Slim, lightweight aluminium perimeter frame

Convincing Results Industry-leading Performance

NEW

Standard

Hard

Soft4-position handlebar 2-position footpegs

Adjustable Ergonomics

4

KEY FEATURES

Fuel-injected engine offers hard-hitting power across the rev-range while ensuring stable fuel-metering in all conditions.

449 cm3 liquid-cooled, 4-stroke Single with battery-less fuel injection - P.5

Lightweight ø43 mm throttle body uses two shafts joined by a progressive link to give sharp response and excellent power feeling.

Progressive throttle link - P.11

New-design factory-style front and rear petal brake discs offer strong braking performance, excellent control and high-quality sporty looks. Oversized ø270 mm front disc further enhances controllability.

Petal brake discs - P.22Factory styling - P.23

Complementing the factory-style design and graphics, black alumite1 rims, black fork guards, new green highlights help create a distinctive Kawasaki identity. Green alumite1 finish on the suspension adjusters and green finish on some of the engine trim add to the KX450F’s high-performance image.

Adjustable footpeg position - P.20

Riders can choose from two positions to suit body size and preference.

Works-base bridged-box bottom piston (unique Kawasaki feature used for the first time on a mass-production motocrosser on the 2010 KX450F) is just one of many features inspired by our factory racers. New piston crown increases compression ratio and improves combustion efficiency for stronger pull and quicker revving.

Factory-inspired tuning - P.6NEW

New Uni-Trakrear suspension - P.18

Linkage mounts below the swingarm for more precise suspension tuning. Dual compression adjustability offers a wide range of tuning options. Self-lubricating alumite coating on the tank cylinder improves wear resistance and shock action. For 2015, revised settings contribute to improved damping for increased high-speed handling and ride stability.

NEW

Lightweight ECU was designed specifically to withstand the rigors of motocross racing. ECU contains three engine maps (plus a fourth for Launch Control Mode). Settings for the three maps can be reprogrammed with the optional KX FI Calibration Kit. For 2015, revised programming offers improved traction.

Setting-adjustablemotocross ECU - P.6,9,11

NEW

Super-hard titanium coating protects the fork from wear abrasion. Self-lubricating alumite coating creates a hard, low-friction surface on the outer tube, protecting the aluminium surface and further reducing friction to promote smooth fork action.

Race-readyfront suspension - P.17

NEW

designates a key feature with primary communication priority.

Factory-racer-style SFF-Air TAC front fork locates its damping assembly in the left fork tube and a pneumatic spring, comprised of three pressurised air chambers, in the right. Light weight, low friction, easy adjustability, a wide setting range and precise settings are some of the advantages.

SFF-Air TAC(Triple Air Chamber) - P.14

NEW

Aluminium perimeter frame is a lightweight construction composed of forged, extruded and cast parts. Slim design contributes to racer-friendly ergonomics.

Slim aluminium perimeter frame - P.13,20 Slim, racer-friendlyrider interface - P.19

Slim frame, minimalist bodywork and a flat tank-seat line were designed to make it easier for racers to go fast.

DFI SettingData Selection - P.8

Using the provided DFI couplers, riders can quickly and easily access their choice of three maps (standard, hard, soft) provided in the ECU.

Launch Control Mode- P.7

Factory-style launch control system increases the chance of getting a good start by helping riders maximise traction when starting on a slippery surface.

Adjustable handlebar position - P.19

A choice of four positions allows riders to tailor their riding position. Factory-style Renthal handlebar and pad come standard.

5

HARD-HITTING FUEL-INJECTED POWER

HARD-HITTING FUEL-INJECTED POWERFuel-injected 449 cm3 liquid-cooled, 4-stroke Single delivers hard-hitting power from low- through high-rpm. The broad powerband and responsive throttle offer a broad spread of torquey response that enables racers to get on the gas and go even from down low. Race-inspired tuning and parts like the high-performance bridged-box bottom piston (a mass-production first when introduced on the 2010 KX450F) ensure top-level performance right out of the box. For 2015, a revised piston crown and ECU settings result in an engine that pulls more strongly and spins up more quickly.



2

20152014

1

Factory-racer engine tuning

* Revised piston crown increases the compression ratio (12.5:1 >>12.8:1), contributing to increased performance, and creates a modifiedsquish area that promotes better air circulation for improved combustionefficiency. The new shape is almost the same used on Kawasakifactory racers, and results in a stronger mid-range hit and strongerfeeling at high-rpm and over-run. In general the engine feels lighteracross the rev-range, and the engine pulls strongly after an up-shift.(Photo 2)

* ECU settings (fuel and ignition maps) ensure the ideal fuel-air mixtureand offer a smoother power delivery when transitioning from low tohigh rpm. In addition to ensuring usable power at all rpm, the settingscontribute to racer-friendly engine braking characteristics.

* Revised ECU settings include programming that enhances traction byretarding ignition when the rear wheel speed increases too quickly (i.e.from sudden, excess wheel spin).

* Wedge-shaped crank web increases offsetting moment for a highcrankshaft balance factor. At close to 60%, the balance factor of the ’15KX450F is on par with Ryan Villopoto’s factory racer. The high balancefactor contributes to reduced engine vibration, smoother power deliveryand increased performance – especially at low rpm, where response isnoticeably snappier.

* In addition to generating the electrical output necessary to ensure easystarting, the large-diameter ACG also contributes to engine feeling atpartial throttle.

NEW

NEW

* High-performance piston, featuring the same design used on ourfactory racers, contributes to improved performance at all rpm. Ashort skirt, reinforcedexternal ribs and theuse of a bridged-box bottom, featuringinternal bracing, resultin a lighter, strongerpiston. (Photo 1)



A

3

* Even for top-level riders, controlling the massive power of a 450cc-classmotocrosser off the start requires a high degree of throttle control andclutch finesse. By slightly reducing this power, Launch Control Modehelps riders maximise traction, increasing the chance of getting a goodstart.

* To activate Launch Control Mode riders depress the launch controlbutton (for two seconds or more), located at the left handle. (Whenactivated, the indicator lamp next to the button will flash quickly to letthe rider know it is on.) (Photo 3)

* Launch Control Mode works in 1st and 2nd gear (and Neutral). Oncethe rider shifts into 3rd gear, the system is automatically disengaged,switching back to the normal engine map.

* System designed to the same specifications as that of our AMA factoryracers.

* The KX450F features alaunch control systemsimilar to that on ourfactory racers. With thesimple press of a button,riders can activate aseparate engine mapdesigned to ensureefficient race starts inslippery conditions. (TheLaunch Control Modemap retards ignitiontiming, allowing tyres togain grip in low-tractionsituations, and allowingriders to focus on theirlines.) (Illustration A)

* Launch Control Mode has the greatest effect within the first fewseconds of releasing the clutch off the start. This is the most crucialtime for riders to get ahead of their rivals so they are better positionedgoing into the first corner.

The holeshot advantage: Launch Control Mode KX motocrossers have long drawn on works technology to offer riders the best possible performance right out of the box. Launch Control Mode is just one of the factory features that give riders an edge when lining up at the start gate.



Standard

Hard

Soft

Easy engine tuning: DFI Setting Data Selection (3 map choices)Adjusting engine settings to suit conditions has never been easier than with the KX’s DFI couplers. Plug-and-play style system is quick, easy and stress-free.

* Instead of a single engine map, the ECU features three (four, countingthe Launch Control Mode map).

* Initial settings for the three maps are: Standard, Hard (conditions) andSoft (conditions). Using provided DFI couplers, riders are able to easilyswitch between the three maps to suit riding conditions. Plugging ineach of the 4-pin couplers activates the corresponding engine map.(Plug is conveniently located on the right side of the head pipe for easyaccess without having to remove any parts.)

* Each of the three maps can be reprogrammed using the optional KX FICalibration Kit. (Please see below.)



most sample maps offered in industry

only data logging function in industry

choice ofdisplay

4

* The KX FI Calibration Kit contains KX Racing software, an ECUcontroller, mounting equipment and dampers and a USB cable. Inaddition to the kit, some model-specific parts (available separately), aPC and 12 V battery are all that is required. (Photo 4)

* While the kit is designed to satisfy racers and expert riders, it is simpleand hassle-free to use:- the ECU controller mounts behind the number plate for easy access- accessing the ECU is accomplished simply by connecting to a PC via

the ECU controller using a USB cable (no additional switches are necessary) - setting adjustments can be prepared in advance on a PC, or done when connected to the ECU - the kit’s user-interface is simple to understand and easy to use

* The KX FI Calibration Kit contains seven preset settings that can bequickly and easily used to adjust the ECU to suit track conditions. Theprovided settings are shown below.

The KX FI Calibration Kit is the same kit used by Kawasaki’s works teams in the U.S. The kit enables expert riders to adjust engine characteristics (by rewriting actual data maps) to suit their preference, record riding data, and analyse their riding data to further fine-tune their settings.

Precision engine tuning: KX FI Calibration Kit (option)

Controller sub-harness†

USB cableSoftware CD-ROMPower supply harness

ECU mounting bracket†

(replacement part for use with kit)

Controller bracketECU controller

Wire harness clampController bandsUpper/lower controller dampersController damper

† Part is model-specific (KX450F, KX250F require different parts) and sold separately

Richer fuel setting

Leaner fuel setting

Advanced ignition setting

Retarded ignition setting

Hard riding surface setting

Soft riding surface setting

Beginner setting

fuelling 5% richer than stock

fuelling 5% leaner than stock

ignition advanced 3o from stock

ignition retarded 3o from stock

ignition retarded, fuelling richer

ignition advanced, fuelling leaner

engine power suppressed: ignition retarded, fuelling richer

SETTING DESCRIPTION



* Both click-and-drag (using the graph window) and numerical editing(using the map sheet) are possible.

* When connected to the ECU, the KX FI Calibration Kit can be used todisplay the status of a running engine. Information can be displayed innumeric form using the Data Monitor, or in visual form using the variousdisplay options offered by the Data Meter.

* The logged data can be lined up with the course layout to check actualriding, enabling more efficient FI settings to be determined. It alsoenables before-and-after comparisons and comparisons between riders.

* Kit is compatible with both 64-bit operating systems (such as Windows 7)and 32-bit systems (Windows 7, XP, Vista).

For more detailed information on use and functions of the FI Calibration Kit, please refer to the KX FI Calibration Kit Instruction Manual.

* The KX FI Calibration Kit can also be used as a data logger, recordingup to six hours of data depending on the number of parameters (enginerpm, angle of throttle opening, etc)being recorded. After riding, theriding data can be viewed usingthe [Analyze] window. Parametersto be recorded and displayed canbe selected independently.

3D Surface Display 3D Frame Display 2D Graph Display

Data Monitor Window Data Meter Window

* For more advanced setting optimisation, the ECU maps for volume offuel injected (via the FI adjustment window) and ignition timing (via the IGadjustment window) can be adjusted for given throttle position and rpm.

* Multiple display options are available. Click [3D Graph] or [2D Graph] ofthe [3D/2D] to select the 3 or 2-dimensional display. When you use the[3D Graph], select [Surface Display] or [Frame Display] of the [3D GraphType] to select the display type.

Base settings are shown as a flat graph (left). Settings can be increased or decreased from the base according to rider preference (right).



Battery-less fuel injection system

* Ensuring quick starting without a battery was a prime directive whendeveloping the KX450F’s fuel injection system. Using only electricitygenerated by the kick starter, the engine can be started with onlythree rotations of the crankshaft. The system delivers electricity in thefollowing order: 1) ECU, 2) fuel pump, 3) injector. With a warm engine,starting can be accomplished in a single kick.

* The compact, lightweight ECU, located just in front of the steering head(behind the number plate), was designed specifically for motocross use.To help cope with the shocks and vibrations of motocross riding, thefuel pump relay is built in to the ECU.

* The ø43 mm throttle body makes use of a progressive throttle linkto deliver airflow in much the same way as would a FCR carburettor.Using two linked shafts, the throttle body opens more quickly afterthe 3/8 open position, delivering sharp response and excellent powerfeeling.

* Ultra-fine atomising injector with 12 holes sprays particles with a dropletsize of 60 μm for smooth power delivery and improved engine responseat partial throttle.

* The injector was set at 45o, the optimum angle for improved mid-rangepower.

Designed specifically for motocrossers, the fuel injection system incorporates a small lightweight ECU and operates without a battery to further eliminate unnecessary weight. And of course, fuel injection eliminates the need to adjust engine settings to suit track and climate conditions.

* Lightweight flat-bottom aluminium fuel pump is located in the plasticfuel tank.

* To ensure a stable fuel supply during vigorous motocross riding, the fuelpump features a unitised plastic fuel filter cover that wraps around theinlet port and acts as a fuel trap. (Unitising the filter cover, changing itsmaterial from rubber to plastic and eliminating the fuel return hose fromthe pressure regulator contribute to weight reduction.)



Other performance-enhancing engine characteristics* Aluminium valve spring retainers reduce reciprocating weight for reliable

valve control at high-rpm.

* Double valve springs also help ensure stable valve operation and allowa short cylinder head height.

* 32 mm thick, 127.8 mm wide radiators with wide fin and tube pitch offerresistance to mud build-up while maintain cooling performance.

* Large openings in the radiator shrouds promote airflow, contributing tocooling performance.

* The screw-type adjuster on the cam chain tensioner is equipped witha pressure spring. Because the system automatically minimises thevibration caused by a loose cam chain, it greatly reduces the chanceof a mishap during a race. (Non-automatic systems that are tunedincorrectly can actually adversely affect valve timing by putting toomuch pressure on the cam chain.)

* The combination of the smooth-shifting, close-ratio 5-speedtransmission with the KX450F’s low-rpm engine performance offers therider the option to shift to a higher gear when traversing rough sections.This reduces the effect of sudden (unwanted) throttle input, allowingfocus to be given to racing rather than careful throttle control.

* In the event of a stalled engine during a race, getting it started again assoon as possible is a racer’s first priority, so the KX450F is equippedwith an automatic compression release (ACR) system. The dual-weightcentrifugal decompression system fitted to the exhaust cam easesstarting in much the same way as a conventional lever-type system.

* Sprocket-style chain drive roller helps smooth engine braking byreducing the effect of driveline lash when the rider gets off the gasquickly and play in the lower side of the chain suddenly tightens. Theadditional control facilitates corner entry.

* The engine wastuned such that thetorque curve followsthe limit of runningresistance for aslong as possible.(Unchecked, enginetorque can exceedthis limit, resultingin wheel spin, whichdoes nothing to helpforward momentum.)

* Efforts were made toachieve the widestpossible torqueband, so that tractionefficiency wouldbe maximised for agreater part of the revrange.

* The engine is almost upright (forward lean angle is 3o) to help place thebike’s centre of gravity in the ideal position for maximum traction.

* Asymmetrical high-acceleration cams yield high intake efficiency.

* During the cylinder head casting process, the cores for the intake portswere given a special coating to make the intake ports smoother. Theextremely smooth surfaces that result increase intake efficiency atall rpm.

* Lightweight titanium valves (IN: 36 mm; EX: 31 mm) reducereciprocating weight and offer high-rpm reliability.


FACTORY-STYLE CHASSIS COMPONENTS AND TUNING

FACTORY-STYLE CHASSIS COMPONENTS AND TUNINGThe KX450F’s slim aluminium perimeter frame is a lightweight construction composed of forged, extruded and cast parts. Chassis balance and settings were all set to suit race-experienced riders. The centre of gravity and key dimensions (swingarm pivot, output sprocket and rear axle locations) were chosen so that the rear tyre would drive the bike forward (instead of causing it to squat). Complimenting the KX450F’s highly acclaimed high-speed stability, light handling and racer-friendly adjustable ergonomics, for 2015 a new SFF-Air TAC front fork enables racers to ride even faster.



Advanced race-ready suspension: SFF-Air TAC (Triple Air Chamber)The KX450F features Showa’s SFF (Separate Function front Fork)-Air TAC (Triple Air Chamber). The works-replica fork is very lightweight and highly rigid, contributing to superior riding stability. With settings chosen for high-level to expert riders, the new fork offers excellent shock absorption performance at high speeds, making it easier for racers to ride faster. Numerous other benefits include:

- high rigidity- very light weight- low friction- reduced heat influence from

damping assembly- precise settings possible merely

by changing air pressure- easy adjustability



B

C

* Damping and shock absorption duties are separated: > Left fork tube: damping assembly > Right fork tube: (pneumatic) spring

The configuration offers both smooth action and firm damping performance – a combination difficult to achieve with a conventional fork. (Illustration B)

* Using large ø49 mm inner tubes (same size used on our factory racers)contributes to high fork rigidity, resulting in a more planted feel from thefront wheel.

* Extremely lightweight construction means the left and right fork tubesweigh a combined 7,950 g (a savings of approximately 840 g comparedto a conventional fork).

* Instead of coil springs (like on a conventional fork), the SFF-Air TAC’sright tube has three chambers filled with pressurised air that act as aspring:

> Inner chamber: Main air spring > Outer chamber: Sub air spring > Balance chamber: Balance air spring

* The inner chamber, with a standard air pressure of 1,000 kPa(600-1,300 kPa range), does most of the work, supporting 60% or moreof the motorcycle’s weight. (Illustration C)

NEW NEW

NEW

NEW

NEW



* The outer chamber, with a standard air pressure of 50 kPa (0-130 kParange), supports the inner chamber, much like the role of the outercylinder air room in a conventional fork. (Illustration D)

D

E

NEW

* Because main springs are not used, changing the fork character ismuch simpler on the SFF-Air TAC than changing the spring rate ona standard fork. Adjusting the air pressure in the fork easily allowsthe TAC “spring rate” to be adjusted – without the hassle of havingto disassemble the fork. Adjustments to suit rider and track can beaccomplished on site, without additional parts, and with minimal tools.

NEW

* The balance chamber, with a standard air pressure of 900 kPa (530-1,400 kPa range), provides a counter-force to the inner chamber,ensuring ride comfort. When the fork is fully extended, the innerchamber pressure is at its minimum and the balance chamber pressureis at its maximum; when the fork is fully compressed, the inner chamberis at its maximum and the balance chamber pressure is at its minimum.(Illustration E)

NEW



657

* Air pressure can be changed with a high-pressure tyre pump. (Usinga pump with a built-in air gauge and a flexible hose is recommended.).(Photos 5-6)

NEW

NEW

NEW

NEW

NEW

NEW

NEW

* Simply changing the TAC’s air pressure covers the range of settingsoffered by optional springs for a standard fork.

* During the compression stroke, the pressurised air exerts a strongcounterforce, contributing to bottoming resistance. However, during therebound stroke, the pressurised air offers little resistance, contributingto increased road holding and a planted feel from the front.

* Friction generated between the springs and fork inner tubes in astandard fork is especially apparent in the latter half of the fork stroke.Eliminating the main springs alone reduces friction by approximately20%. With the balance chamber, a balance spring is not necessary,allowing friction to be reduced further. The low friction results inextremely smooth action throughout the fork stroke.

* Being able to use a larger damper piston (thanks to the elimination ofthe fork springs) not only enables smoother action, it also makes firmdamping performance possible. The damper piston measures ø30 mm(vs ø24 mm on a conventional fork).

* Compression and rebound damping settings can be adjusted as on astandard fork.

* Balance chamber pressure can be adjusted to act as an initial “preload.”

* A self-lubricating alumite coating creates a hard, low-friction surfaceon the outer tubes. The hard coating helps prevent wear abrasion onthe inside of the tubes, ensuring the sliding surfaces remain smoothfor a long time, while the outside is protected against corrosion. Thelubricating material in the coat contributes to smoother suspensionaction (especially at the initial part of the stroke) and a better ride feel.

NEW

* A super-hard titanium coatingon the outer surface of the innerfork tubes helps prevent wearabrasion. The increased surfacehardness of the dark navy bluecoating also helps to preventscratches and damage to thetubes. Because the surfaceremains smooth for a longerperiod, sliding friction (andstiction) is reduced and actionis improved, contributing to asmoother ride. (Photo 7)

Self-lubricating alumite coating

Ti coating

NEW



8

Race-oriented rear suspension

NEW

* A self-lubricating alumite coating on the tank cylinder helps preventwear abrasion, and reduces friction for smoother suspension action.

* Revised valve settings result in stronger damping. The firmer settingsresult in improved high-speed handling, greater ride stability andimproved performance when landing jumps.

* The New Uni-Trak rear suspension system mounts the suspension armbelow the swingarm, allowing a longer rear suspension stroke. Thelonger stroke in turn allows more precise rear suspension tuning.

* Extensive rider testing was conducted to determine the ideal linkageratios and rear shock absorber damping settings to achieve maximumrear wheel traction.

* The rear shockfeatures dualcompressionadjustability, allowinghigh-speed and low-speed damping tobe tuned separately.(Photo 8)



F

Slim, adjustable rider interfaceThe KX450F’s frame and minimalist bodywork, designed with rider ergonomics in mind, offer a slim rider interface and racer-friendly ergonomics. Complemented by adjustable handle and footpeg positions, the natural riding position makes it even easier for racers to go fast.

* Upper triple clamp with two sets of handle mount slots and reversiblehandle mounts offers riders a choice of four handle positions to choosefrom: 25 mm FWD, 15 mm FWD, STD and 10 mm BK. (Illustration F)



9G

* Minimalist shrouds were designed to be small and are slim where theycome in contact with the rider’s legs. 2-tone design was achieved usinga double-injection moulding process.

* Minimalist side covers were also made as small as possible.

* The seat uses a slip-resistant top surface for good grip when seatedand smooth sides for excellent rider mobility. Seat urethane helpsmaintain the original shape longer.

* Adjustable footpeg brackets enable riders to lower their footpeg position5 mm. In the lower position, centre of gravity is lowered as is therider’s point of view, adding to both physical and psychological stability.(Illustration G)

* Using an optional rear suspension tie rod (1 mm longer than normal),riders can lower their seat height by 4 mm (measured at the centre ofthe seat). While 4 mm may not sound like much, on a race bike beingable to make ride position adjustments without any compromise toriding performance is extremely beneficial.

* The frame is narrow across the main pipes, contributing to a slimpackage with good ergonomics. The slim riding position facilitatescontrol.

* The flat design of the tank and seat gives the rider greater freedom ofmovement when changing riding position, and facilitates sitting fartherforward. (Photo 9)



10

* Seams between the shrouds, seat and side covers are very flush, whichfacilitates control as well as moving around on the bike. (Photo 10)

* The frame widens at the ankles to offer the rider better grip and narrowsnear the bend below the seat to allow a slim riding position.

* Optimised exhaust pipe line also contributes to the racer-friendlyergonomics.

* Wide (front-to-rear) footpegs designed to offer grip and superb feel atthe pegs.

* The clutch cable boot features a large quick adjuster, making it easierfor riders to adjust play in the clutch cable.

* Throttle grip has a unitised collar. The one-piece unit providesadditional stability during throttle operation.

* Lightweight grips feature a grip pattern designed to provide bothexcellent grip and superior cushioning for riders’ hands.



13

NEW

1211

* A factory-styleRenthal (standard-type) aluminiumhandlebar is standardequipment. (Photo 13)

* Rib-less rear hub and butted spokes reduce unsprung weight.

* Lighter front and rear wheel axles save 31 g and 32 g, respectively.

* Petal disc brakes are among the KX450F’s numerous factory-stylecomponents. The new stylish discs contribute to both sporty looks anda high-quality appearance. (Photos 11-12)

Other race-oriented chassis componentsNEW

* Oversized semi-floating ø270 mm front disc contributes to significantly stronger front brake force, as well as enhanced controllability.

* Complementing the large-diameter discs, a pushrod-type front brakemaster cylinder and front brake pads with a high coefficient of frictiondeliver strong braking force and superb control (especially for the initialbite and initial-mid stroke characteristics).

* Rear caliper guard protects the caliper from damage.

NEW



17

14 15

16

NEW* Embossed design

on the clutch coverdesigned to graduallyappear as contactfrom riding bootswears off the paint.(Photo 17)

* Fork and rear shock adjusters have a green alumite1 finish like our U.S.factory racers.

* Green finish on the oil cap and the two plugs on the generator coverfurther contribute to factory looks.

* Engine covers are finished in silver paint, further reinforcing theKX450F’s factory image.

* Rims are coated inblack alumite1 – justlike our factory racers.(Photo 16)

* For 2015, green highlights on the suspension adjusters and engine oilcap and generator cover plugs contribute to a distinctive Kawasaki look.(Photos 14-15)

Factory stylingThe KX450F’s minimalist bodywork, fender and number plate designs ensure it is the sharpest looking bike in the paddock. Factory-style graphics further reflect the KX450F’s highly tuned performance.

24

ADDITIONAL FEATURES

Engine* Fast-idle knob on the throttle body allows riders to increase engine

speed when first starting a cold engine.

* The crankshaft and connecting rod received a carburising andquenching treatment for additional rigidity.

* The camshaft lobes feature a soft-nitriding surface treatment for longwear and high-rpm reliability.

* Tappet surfaces receive a carburising treatment for increased durability.

* A large flap inside the air cleaner case helps prevent the ingressof mud.

* The silencer uses long-fibre packing which is much more resistant tobeing blown out of the tail pipe than standard length packing. As aresult, packing needs to be replaced half as often.

* Silencer construction (which varies slightly by market) ensures thatrespective noise regulations are met.

Chassis

Other* Optional engine parts include magneto rotors with different inertias

(8.5, 9.5 kg.cm2; STD: 9.0 kg.cm2).

* Optional chassis parts include handlebar holders for a ø28.6 mm bar(STD: ø22.2 mm), aluminium and steel rear sprockets (48-52T; STD:50T), solid petal brake rotors for wet races, and different springs for therear shock (52, 56 N/mm; STD: 54 N/mm).

* The alloy swingarm uses a cast front section, tapered hydroformedspars and forged chain adjusters.

* Large synthetic skid plate offers great protection with minimum weight.

* Thinner walls for the tubes of the rear frame (t2.0 mm >> t1.8 mm) saveapproximately 50 g in weight.

NEW

25

COLOUR(S)

* Lime Green with factory-style graphics

1 Alumite: an anodic oxidation finishing treatment for aluminium resulting in a coloured, corrosion/scratch-resistant film coating.

26

SPECIFICATIONS

KX450FFFENGINE

DRIVETRAIN SUSPENSION

FRAME

Type

Displacement

Bore and Stroke

Compression ratio

Valve system

Fuel system

Ignition

Starting

Lubrication

Type

Wheel travel: front

rear

Tyre: front

rear

Caster (rake)

Trail

Steering angle (left/right)

Transmission

Final drive

Primary reduction ratio

Gear ratios: 1st

2nd

3rd

4th

5th

Final reduction ratio

Clutch

Front: Type

Compression damping

Rebound damping

Rear: Type

Compression damping

Rebound damping

Spring preload

5-speed, return

Chain

2.727 (60/22)

1.750 (28/16)

1.412 (24/17)

1.188 (19/16)

1.000 (19/19)

0.875 (21/24)

3.846 (50/13)

Wet multi-disc, manual

ø49 mm inverted telescopic

Separate Function front Fork Air -

Triple Air Chamber (SFF-Air TAC)

22-way

20-way

New Uni-Trak

19-way (low-speed), 4 turns (high-speed)

22-way

Fully adjustable

Liquid-cooled, 4-stroke Single

449 cm3

96.0 x 62.1 mm

12.8:1

DOHC, 4 valves

Fuel injection: ø43 mm x 1 (Keihin)

Digital DC-CDI

Primary kick

Forced lubrication, semi-dry sump

Perimeter, aluminium

314 mm

315 mm

80/100-21 51M

120/80-19 63M

27.9o

120 mm

42o / 42o

27

SPECIFICATIONS

KX450FFFBRAKES

DIMENSIONS

Front: Type

Caliper

Rear: Type

Caliper

Overall length

Overall width

Overall height

Wheelbase

Ground clearance

Seat height

Curb mass

Fuel capacity

2,195 mm

820 mm

1,275 mm

1,495 mm

340 mm

960 mm

112.1 kg

6.2 litres

Single semi-floating ø270 mm petal disc

Dual-piston

Single ø240 mm petal disc

Single-piston

The specifications mentioned here apply to and have been achieved by production models under standard operating conditions. We intend only to give a fair description of the vehicle and its performance capabilities but these specifications may not apply to every machine supplied for sale. Kawasaki Heavy Industries, Ltd. reserves the right to alter specifications without prior notice. Equipment illustrated and specifications may vary to meet individual markets.

KX450F 2015 Questions

1. Which gears does the KX450F Launch Control Mode work in?

2. What does the Launch Control Mode do to the ignition timing?

3. The new ECU includes new programming what is the main feature?

4. How many adjustable maps does the ECU feature?

5. How many map presets and how many hours Data Logging are availablewhen using the Optional KX FI Calibration Kit?

6. What is the new compression ratio and how was this changed?

7. The 2015 model has new Showa forks, what does the SFF-AIR TAC name indicate?

8. Name3benefitsthattheSFF-AIRTACofferscomparedtoastandardfork?

9. What is total weight saving of eliminating the springs in the SFF-AIR TAC forks.

10. How do you change the air pressure in the SFF-AIR TAC forks?

11. By how much is the friction reduced by eliminating the main springs in the SFF-AIR TACforks.

12. What is the exclusive navy blue coating on the outside of the inner fork tubes?

13. How many handlebar positions can you choose from on the KX450F?

14. How far can the adjustable footrest be lowered?

15. How many AMA SX and AMA MX series wins has Ryan Vilopoto won of his KX450F.

16. What diameter is the class leading KX450F front brake?

17. What type of handlebars are standard on the KX450F?

18. What color are suspension adjusters and engine oil cap and generator cover plugs on the2015 KX450F?

19. How is the rear sub frame changed.

20. What is the fuel tank capacity?

21. What is the curb mass?

22. What is the special coatings on the outer fork tubes and on the rear shock reservoir?

23. What are the advantages of this coating?

24. What is the diameter of the new Showa SFF-AIR TAC forks?

Answers next page.

KX450F 2015 Answers1. 1st & 2nd plus neutral. P7

2. Retards the ignition timing. P7

3. The revised ECU programming enhances traction by retarding the ignition timing P6when the rear wheel speed increases too quickly (i.e.) from sudden wheel spin.

4. The ECU features 3 (standard, soft and hard) plus Launch Control Mode, 4 in total P8

5. 7 preset maps and 6 hours data logging. P9

6. The revise compression ratio is from the new piston, the change to the squish area P6promotesbetterairflowcirculationforimprovedcombustionefficiency.

7. The KX450F features Showa Separate Function front Fork -Air (Triple Air Chamber) P14

8. High rigidity, very light weight, low friction, easy adjustability, reduced heat P14 influencefromdampingassembly,precisesettingpossiblemerelybychangingairpressure

9. 840 grams (approximately) P14

10. Air Pressure can be changed with a high pressure tyre pump. (Using the a pump P14withabuilt-inpressuregaugeandaflexiblehoseisrecommended

11. 20% lower friction P17

12. A super-hard titanium coating is used on the outer surface of the inner forks tubes P17

13. 4 positions, rearwards 10 mm, STD, forward 15 mm and forward 25 mm P19(35 mm range)

14. 5 mm lower P20

15. Ryan Vilopoto and his KX450F has won 6 in total AMA SX and MX Championships P3

16. The KX450F front petal semi-floating disc brake is an oversize 270 mm. P22

17. Renthal aluminium handlebars P22

18. Green highlights on the suspension adjusters, engine oil cap and generator cover P23plugs contribute to a distinctive look.

19. Thinner walls for the tubes of the rear sub frame save approx 50 g in weight. P24

20. 6.2 litres P27

21. 112.1 kg (down 400 g) P27

22. New self lubricating Alumite coating P17

23. Alumite creates a hard, low-friction surface which helps prevent wear abrasion P17on the inside of the tubes

24. The new SSF-AIR TAC Forks are 49 mm diameter P15

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