2000 Yamaha YFM400FWA(M) Factory Service workshop Manual, Page 142Get this manual

2000 Yamaha YFM400FWA(M) Factory Service workshop Manual, Page 142

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CAMSHAFT, ROCKER ARMS AND VALVES 2.Replace: Valve guide

3.Inspect: Valve face Pittingwear Grind the faceValve stem end Mushroom shape or diameter larger than the body of the stem Replace<