2013 RM-Z Technical Presentation

7/31/2019 2013 RM-Z Technical Presentation

http://slidepdf.com/reader/full/2013-rm-z-technical-presentation 1/48





Focus of Improvement

• Meet new FIM sound controlwithout sacrificing engineperformance*

• Enhance mid-range power to beuseful in racing

• More controllable handlingcharacteristics to be accepted bywider range of riders

*European spec only



Achievements

• Engine – Broader low- & mid-range power and torque

– Stronger acceleration & throttle response – More precise & smoother shift feel

• Chassis – Refined shape of frame and seat rail

– Improved agility & handling

– Enhanced front & rear suspension

• Electrical – Higher-performance processor in ECM

– Revised ignition coil settings – Increased power-generating magneto



Engine


http://slidepdf.com/reader/full/2013-rm-z-technical-presentation 6/48RM-Z450 Engine Changes

Lighter piston& DLC piston pin

New intakecamshaft

Newconnecting rod

Newstator coil

Newcam chain guide

Redesignedtransmission

Reshapedshift cam

Thinner crankcasereed valveNew oil strainer

with magnet

Engine


http://slidepdf.com/reader/full/2013-rm-z-technical-presentation 7/48RM-Z250 Engine Changes

Newignition coil

Newstator coil

Reshapedshift cam

New oil strainerwith magnet

New intakecamshaft

Lighter piston& new piston pin

Newcrank pin

Redesignedtransmission

Redesigned

clutch releaseThinner crankcase

reed valve

New exhaust cam

shaft

Engine





RM-Z250 piston also received feedback from FEM analysis.New piston is 3% lighter without sacrificing the rigidity.

Engine



Engine

DLC coated piston pin (450 only)

Lighter connecting rod (450 only)

Piston / Piston pin / Connecting rod 250 /450

Piston is 3% lighter (250 only)

Thicker and shorter piston pin (250 only)

13% lighter piston (450 only)

2013 RM-Z250

DLC

2013 RM-Z450450

250



Engine

Changed intake cam timing

Increased controllability

Camshafts (250 / 450)

Changed cam profile

450 250

Changed intake cam’s working angleand lift amount

Smoother characteristic

Delayed exhaust cam timing

Enhanced low-to-top range power delivery

Increased intake cam’s working angle &lift amount

Increased controllability



Engine

2012 2013

IN. 34.80 mm 35.20 mmEX. 34.00 mm 34.20 mm

Changed intake cam timing

Camshafts (250 / 450)

Changed cam profile

450 250

Changed intake cam’s working angleand lift amount

Increased intake cam’s working angle &lift amount

2012 2013

IN. 35.20 mm 35.60 mmEX. 34.45 mm ←

Delayed exhaust cam timing



Engine

Crank pin 250 only Current model

New model

Change the shape of passage in crank pin.

Enhance the durability of the bearing atthe big end.

Capture more sludge, better lubrication



Engine

Better shift feel

More precise gear shiftoperation

Redesigned Transmission (450)(change the shape of 2nd, 3rd, 4th and 5th gears)

Redesigned shift cam

New clutch release (250 only)

Transmission(250 / 450)

All new Transmission (250)

Redesigned stopper spring

Redesigned drive shaft

Redesigned shift cam stopper plate

Changing the sprocket spacer’s ring

*250 transmission



Engine

Better cooling efficiency = More stableperformance

Easier for maintenance(Easier to add coolant)

Revised hose routing

New by-pass hose connects L&R

Redesigned radiator (250 only)

Changed fin pitch

2012 model2013 model





Engine

Air cleaner (250 / 450)

Change the shape of air cleaner outlet

450

250

Increase bottom- to mid-range powerdelivery

Enhance the throttle response

Increased the volume of the aircleaner outlet tube (60ml)

Increased the volume of the air cleaneroutlet tube (160ml)



Engine

Back panel of cleaner box (450 only)

Now made of carbon fiber mixed material

Reduce intake noise



Engine

Cam chain guide (450 only)

Changed material

Better reliability

Changed cross section surface(From T to H)

Enhanced abrasion resistanceand strength

Enhanced rigidity



Engine

RM-Z450

More power & torque from bottom-end to mid-range!!



RM-Z250

Improved power & torque from mid- to high-rpm range!!

Engine



Chassis



Chassis

Front fork

Seat rail

Air cleaner box

Air cleaner outlet tube

Under bracket

Frame

Rear suspension

Muffler

2013 RM-Z450 Chassis ChangesLinkage rod

Linkagebolt



Chassis

Front fork

Seat rail

Air cleaner box

Air cleaner outlet tube

Under bracket

Frame

Rear suspension

2013 RM-Z250 Chassis ChangesLinkage rod

Linkagebolt

Exhaustpipe



Chassis

Reduced the weight by 1% (91g) (450 only)

Change the structure of frame head, tank rail,

down tube and bridge tube

More controllable handling characteristics

Frame / Seat rail (250 / 450)

Optimized rigidity balance

Changed the material of engine mountingbracket from aluminum alloy to steel (250 only)

Changed the shape and position of enginemounting bracket (450 only)



Chassis

Separating the spring and dampingtasks

Front forks (250 / 450)

Reduced friction

Reduced weight by 2%

Increased

absorption performance

NEW

SHOWA Separate Function Fork (SFF)



Chassis

Inner tube diameter is increased from47mm to 48mm

Front forks (250 / 450)

Spring pre-load is now adjustable

Allowing wider range of settingOptimized stability and absorption



Chassis

Improvements over the existing SFF forks

Increased main cylinder / pistonDiameter from 28mm to 30mm

Increased damping force, strongerrigidity with smooth operation

Inner tube diameter is increased from47mm to 48mm

Increased sub piston diameter from34mm to 35mm

Increased cylinder B diameter from20mm to 23mm

This is second generation SFF forks by SHOWA



Chassis

Improvements over the existing SFF

forks…

Inverted joint rod in spring side

Smooth operation in light load

High rigidity in heavy load



Chassis

F l e x u r e R

L

Improvements over the existingSFF forks…

Changed inner parts rigidity

Enhanced stability

Reduced discrepancy of rigiditybetween Right and Left fork

Current SFF forks

New SFF forks developed forRM-Z 2013 model

F l e x u r e

R

L



Chassis

Rear shock absorber (250 / 450)

The structure of piston ring and bladder are

the same as those of 250

More controllable handling

Change setting

250 / 450 450

Increased absorption performance



Chassis

Rear suspension linkage (250 / 450)

Change the link lever ratio

Rear suspension linkage mounting bolts

Progressive suspensiondamping characteristic

Easy maintenance

250

250 / 450

Prevent them from spinning

Reshaped and increased from 12mm to 14mm

Better absorption and smoothoperation

Increased rigidity



Chassis

Chain roller (250 / 450)

Changed to polyurethane rubber diameter 40 mm (with bearing)from foamed polyurethane diameter 35 mm (without bearing)

Reduced flop of chain when accelerating



Chassis

Tires (250 only)

Change to the newest Dunlop MX51 series tires

Enhanced traction performance



Chassis

Radiator shroud (450 only)

Change the width of installation part on the back side of fuel tankcover (Radiator shroud

Make the surface flat (From the side of fuel tank to seat)

Easier to hold the machine



Electrical



Electrical

ECM / Ignition coil(250 / 450

Optimized combustion efficiency

andenhanced roll-on performance

Optimized settings of ECMChanged the sparking

characteristics

Higher power

Higher processing performance

Ignition energy is doubled

Frequency is 1.6 times



Magneto(250 / 450)

Electrical

Enhanced generation and charging performance by 8%

Improve ease of starting





Electrical

Wire harness(450 only)

Easy maintenance

Changed locations of connecting couplers

Easy access

(Rich-lean, MX-TUNER and various service couplers)



Maintenance



Maintenance

FI indicator light (250 / 450) – Optional part

Self-diagnosis function (DTC)

Track engine-operating time and better managemaintenance intervals

New engine hour-meter function



Maintenance

Fuel pump / Fuel pump connector / Maintenance cap & plug(250 / 450)

Fuel pump

Weight savings of 24g

Part of fuel pump is now resin-made

Revised locking system

Fuel pump connector

More precise and easier operation

Maintenance cap & plug

Maintenance cap for fuel pump and plugfor fuel hose are included

Easy maintenance



Maintenance

Steering head dust cover(250 / 450)

Change to plastic with sealedbearing (from steel caps and

rubber seal) Reduced friction

Reduced weight

Increased water /mud resistant



Maintenance

Rear axle / Front fork protector (250 / 450)

Add a dust cover

Change the shape of installation part offront forks

Enhanced durability

Increased water /mud resistant

Added spacer to the installation part offront brake hose





Summary

• Engine – Broader low- & mid-range power and torque

– Stronger acceleration & throttle response

– More precise & smoother shift feel

• Chassis – Refined shape of frame and seat rail – Improved agility & handling

– Enhanced front & rear suspension

• Electrical – Higher-performance processor in ECM

– Revised ignition coil settings

– Increased power-generating magneto



Documents

2013 RM-Z Technical Presentation