2004-2007 Yamaha ATV Raptor 50 YMF50S Service Manual, Page 108Get this manual

2004-2007 Yamaha ATV Raptor 50 YMF50S Service Manual, Page 108

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CAMSHAFT, ROCKER ARMS AND VALVES
aApply Mechanic's blueing dye (Dykem) to the valve facebInstall the valve into the cylinder headcPress the valve through the valve guide and onto the valve seat