Cylinder Head / Cylinder / Piston - HER CHEE ATV-50 II Service Manual

CYLINDER HEAD / CYLINDER / PISTON

Attention of Operation
Can be operated when engine installed on vehicle.
Must cleaning before operating, avoiding dust enter the engine.
Remove the gasket dust stay on joint face.
Avoid to use screw driver harm the joint face when remove the cylinder &
cylinder head.
Avoid to harm the cylinder inner surface and piston face.
Cleaning before check parts, and smear motor oil appointed in sliding face before
installing.
Diagnosis of Troubles
Low compression pressure , poor start , idle speed not stable
Air leakage of cylinder head gasket.
Wear & damage the piston ring.
Wrong installation of spark plug
Wear & damage the cylinder and piston.
Reed valve defect.
Compression pressure too high, overheating, locking
Piling up carbon of cylinder head or piston head.
Piston Noise
Wear the cylinder and piston.
Wear the piston pin hole and piston pin.
Wear the needle bearing of crank connecting rod (small end) .
Piston ring noise
Wear or damage the piston ring.
Wear or damage the cylinder.
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