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4
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Lubrication / Clutch / Transmission
Troubleshooting
Insufficient engine oil Clutch slips when accelerating
y Oil leaks
y Valve guides or seals worn out.
y Worn piston rings.
4-4
Insufficient oil pressure
y Insufficient oil amount.
y Clogged oil strainer, oil route, oil tubes
y Abnormal oil pump
Engine oil dirty
y It’s not exchanged properly on time.
y Cylinder head gasket damaged.
y Worn piston rings.
y Insufficient clutch free play.
y Worn clutch disks
y Weak clutch springs.
Unable to disengage the clutch, or the
bike trembles while clutch disengaged
y Excessive clutch free play settings.
y Warped clutch plates.
Excessive clutch lever pulling force
y Twisted or insufficiently lubricated clutch
cable
y Damaged clutch cable
y Clutch lifter mechanism damaged.
Hard to shift gear
y Excessive clutch free play settings.
y Twisted or bent shifting forks.
Gearshift pedal won’t return
y Broken or weak return spring.
y Bent shift spindle.
Gear jumps out
y Broken stopper arm spring.
y Bent shift spindle.
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