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8. CYLINDER/PISTON ATV 300/250
PISTON RING INSTALLATION
Install the piston rings onto the piston.
Apply engine oil to each piston ring.
· Be careful not to damage or break the
piston and piston rings.
· All rings should be installed with the
markings facing up.
Top
· After installing the rings, they should
rotate freely without sticking. Second
Side Rail
Oil Ring
Side Rail
Measure the connecting rod small end I.D.
Service Limit: 17.06 mm (0.6824 in)
Measure the connecting rod to piston pin
clearance.
Service Limit: 0.06 mm (0.0024 in)
Intake Side Guide
Inspect the exhaust side and intake side
chain guides.
Wear/Damage Replace.
Exhaust Side Guide
8-7