Yamaha WR450F 2022, Owner'S Manual

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TROUBLESHOOTING
8-5
Clutch drags
Faulty clutch spring
Replace the clutch springs as a
set.
Warped pressure plate Replace the pressure plate.
Swollen friction plate
Replace the friction plates as a
set.
Warped clutch plate Replace the clutch plates as a set.
Bent pull rod (outer pull type) Replace the pull rod.
Worn pull rod tooth (outer pull
type)
Replace the pull rod and pull lever
shaft as a set.
Bent push rod (inner push type) Replace the push rod.
Damaged or worn clutch boss Replace the clutch boss.
Seized clutch housing bushing Replace the clutch housing.
Improperly installed pull lever
Align the match mark on the pull
lever before installation.
Incorrect oil level
Adjust the engine oil level to the
specified level.
Incorrect oil viscosity (high)
Change to recommended engine
oil.
Deteriorated oil
Change to recommended engine
oil.
Clutch noise
Damaged or worn primary driven
gear
Replace the primary drive gear or
crankshaft, and the clutch housing
as a set.
Loose clutch boss nut
Tighten the clutch boss nut to the
specified torque.
Fatigued clutch damper Replace the clutch housing.
Worn clutch housing bearing
Replace the clutch housing bear-
ing.
Worn pressure plate bearing
Replace the pressure plate bear-
ing.
Symptom Possible cause Actions