CRANKCASE/CRANKSHAFT/TRANSMISSION
TROUBLESHOOTING
Excessive engine noise
• Worn main journal bearings
• Worn crankpin bearings
• Worn or damaged transmission gear
• Worn or damaged transmission bearings
Hard to shift
• Improper clutch operation (page 10-4)
• Incorrect engine oil viscosity
• Bent shift forks
• Bent shift fork shaft
• Bent shift fork claw
• Damaged shift drum cam grooves
• Bent gearshift spindle
Transmission jumps out of gear
• Worn gear dogs or holes
• Worn gearshifter groove
• Bent shift fork shaft
• Broken shift drum stopper arm
• Worn or bent shift forks
• Broken drum stopper arm spring
• Broken gearshift spindle return spring
12-6