Cylinder/Piston Troubleshooting - Honda TRX450R Service Manual

CYLINDER/PISTON
TROUBLESHOOTING
Compression too low, hard starting or poor performance at low speed
• Leaking cylinder head gasket
• Worn, stuck or broken piston ring
• Worn or damaged cylinder and piston
Compression too high, overheating or knocking
• Excessive carbon built-up on piston head or combustion chamber
Excessive smoke
• Worn cylinder, piston or piston rings
• Improper installation of piston rings
• Scored or scratched piston or cylinder wall
Abnormal noise
• Worn piston pin or piston pin hole
• Worn connecting rod small end
• Worn cylinder, piston or piston rings
12-4