Honda CRF450R 2007 Service Manual

CLUTCH/STARTER CLUTCH/KICKSTARTER/GEARSHIFT LINKAGE
TROUBLESHOOTING
H ar d to s hift
• Improper clutch operation
• Improper oil viscosity
• Incorrect clutch adjustment
• l oose stopper plate boll
• Damaged stopper plate and pin
• Damaged gearshift spindle
• Bent shift fork (page 13-13)
• Bent shift fork shaft (page 13-13)
• Bent fork claw (page 13-13)
Trans mi ssion jumps out of gear
• Worn shift drum stopper arm
• Weak or broken shift arm return spring
• loose stoppe r plate bolt
• Bent shift fork shaft (page 13- 13 )
• Damaged or bent shift fork (page 13 -13)
• Damaged shift drum center groove
• Faul.ty ratchet pawl
• Worn gear engagement dogs or slot (page 13-12)
Gear shift peda l will n ot return
• Weak or broken gearshift spindle return spring
• Bent gearshift spindle
Clutch slips when accelerating
• Incorrect clutch adjustment
• Worn clutch discs
• Weak clu tch springs
• Transmission oil mixed with molybdenum or graphite additives
Motorcycle creeps with
th e engine Idling
• Incorrect
clutch adjustment
• Clutch plate warped
• Faulty clutch lifter
• Incorrect
transmission oil
•
Starter motor tums, but engine does not tu rn
• Faulty starter clutch
• Damaged or faulty starter motor pinion gear , reduction gears , idle gear or starter driven gear .
•
•
11-4
•

Honda CRF450R 2007 Specifications

General

Engine Type	449cc liquid-cooled single-cylinder four-stroke
Bore x Stroke	96.0mm x 62.1mm
Compression Ratio	12.0:1
Transmission	5-speed
Final Drive	#520 chain; 13T/48T
Front Suspension	47mm inverted Showa cartridge fork with 16-position rebound and 16-position compression damping adjustability; 12.4 inches travel
Front Brake	Single 240mm disc with twin-piston caliper
Rear Brake	Single 240mm disc
Front Tire	80/100-21
Rear Tire	110/90-19
Wheelbase	58.3 inches
Seat Height	37.6 inches
Fuel Capacity	1.9 gallons
Induction	Keihin 40mm carburetor
Ignition	CDI
Rear Suspension	Pro-Link Showa single shock with spring preload, 17-position rebound damping adjustability, and compression damping adjustment
Trail	4.6 inches