Troubleshooting - Sym PA12B Service Manual

4 、 Lubrication / Clutch / Transmission

Troubleshooting

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