2001 Yamaha YFM660 Raptor Factory Service Manual, Page 199Get this manual

2001 Yamaha YFM660 Raptor Factory Service Manual, Page 199

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CAMSHAFT AND CYLINDER HEAD
CHECKING THE CAMSHAFT SPROCKET 1.Check: Camshaft sprocket Weardamage Replace the camshaft sprocket and timing chain as seta 14 of tooth Correct Timing chain Sprocket