2008 Yamaha Raptor 250SE / 250SE2 Factory Service Manual, Page 142Get this manual

2008 Yamaha Raptor 250SE / 250SE2 Factory Service Manual, Page 142

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VALVES AND VALVE SPRINGS
aApply coarse lapping compound valve face
CAUTION:
Do not let the lapping compound enter the gap between the valve stem and the valve guidebApply molybdenum