2000 Yamaha YFM400FWA(M) Factory Service workshop Manual, Page 152Get this manual

2000 Yamaha YFM400FWA(M) Factory Service workshop Manual, Page 152

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CYLINDER AND PISTON
Measure

Measurement steps: the piston pin outside diameter aIf out of specification, replace the piston pinOutside diameter (piston pin): 19.99320.000 mm (0.7871