Crankcase/Crankshaft/Transmission/Balancer Troubleshooting - Honda CRF450X 2005 Service Manual

CRANKCASE/CRANKSHAFT /TRANSMISSION/BALANCER
TROUBLESHOOTING
Excessive noise
• Worn crankshaft bearings
• Worn or damaged connecting rod big end
• Worn or damaged connecting rod small end
• Worn balancer shaft bearings
• Improper balancer installation
• Worn, seized or chipped transmission gear
• Worn or damaged transmission bearing
Transmission jumps out of gear
• Worn gear dogs
• Worn gear shifter groove
• Bent shift fork shaft
• Broken shift drum stopper arm
• Broken shift drum stopper arm spring
• Worn or bent shift forks
• Broken gearshift spindle return spring
Hard to shift
• Improper clutch operation
• Incorrect transmission oil weight
• Incorrect clutch adjustment
• Bent shift fork
• Bent fork shaft
• Bent fork claw
• Oamaged shift drum guide grooves
• Bent shift spindle
Engine vibration
• Excessive crankshaft runout
• Improper balancer timing
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