1987-2009 Yamaha ATV YFM350X Warrior Raptor Service Manual, Page 117Get this manual

1987-2009 Yamaha ATV YFM350X Warrior Raptor Service Manual, Page 117

INSPECTION AND REPAIR

If out of the specification, rebore or replace the cylinder, and replace the piston and piston rings as set

PISTON RING 1Measure: Side clearance Out of specificationReplace piston, and rings as setNOTE: Eliminate carbon deposit from piston ring grooves and rings before measuring side clearance307005

Side clearance: Top ring

0.04-0.08 mm (0.00160.0031 in)
2nd ring

0.03-0.07 mm (0.00120.0028 in)

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