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12.2 Fault diagnosis
Low compression pressure Strange noises in crankcase
Air escape in crankcase Parts shattered or broken in crankcase
Overheat of engine Engine stalling
Slipping of clutch Clutch depressed
Lubricant starvation
Unable to put the shift Difficulty in gearshift
Gearshift fork broken or distorted Half disengagement
Fork pin broken Bad operation of shift return spring
Gear cam wear Locked groove wear of shift drum
Automatic off-gear
Joint cam is worn out and the edge turns round.
Weakening elasticity of return spring
The spline gear of the spline shaft and spline groove of the slide gear are worn out, resulting in considerable
axial force in gear movement.
The shift drum and shift fork are worn out.
12.3 Crankcase
12.3.1 Disassembly of left crankcase
cover
Unscrew the binding bolt and unload the left crankcase
cover( called as left cover for short in the diagram).
Unscrew the locknut and unload the magnetor set.
binding bolt
magnetor set
multiple use fixer
box spanner
left cover