2000 Yamaha YFM400FWA(M) Factory Service workshop Manual, Page 146Get this manual

2000 Yamaha YFM400FWA(M) Factory Service workshop Manual, Page 146

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CAMSHAFT, ROCKER ARMS AND VALVES
3.Install: Valve cotters NOTE: Install the valve cotters while compressing the valve spring with the valve spring compressor 1 Valve spring compressor: PNYM-0401