2000 Yamaha YFM400FWA(M) Factory Service workshop Manual, Page 66Get this manual

2000 Yamaha YFM400FWA(M) Factory Service workshop Manual, Page 66

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VALVE CLEARANCE ADJUSTMENT ENGINE
VALVE CLEARANCE ADJUSTMENT NOTE: The valve clearance must be adjusted when the engine is cool to the touchAdjust the valve clearance when the piston is at the T