2008 Yamaha Raptor 250SE / 250SE2 Factory Service Manual, Page 140Get this manual

2008 Yamaha Raptor 250SE / 250SE2 Factory Service Manual, Page 140

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VALVES AND VALVE SPRINGS
5 Measure: Valve margin thickness Out of specificationReplace the valveValve margin thickness Valve margin thickness (intake) 0.801.20 mm (0.03150.0472 in) Valve margin