2000 Yamaha YFM400FWA(M) Factory Service workshop Manual, Page 133Get this manual

2000 Yamaha YFM400FWA(M) Factory Service workshop Manual, Page 133

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CYLINDER HEAD
3.Measure: Cylinder head warpage Out of specification ResurfaceCylinder head warpage: Less than 0.03 mm (0.0012 in)

Warpage measurement and resurfacement steps: Place