2002 Yamaha YFM660 Grizzly factory service and repair manual, Page 220Get this manual
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CRANKSHAFT AND OIL PUMP
INSTALLING THE CRANKSHAFT AND BALANCER 1.Install: Crankshaft Crankshaft installer pot 1: PN90890-01274 Crankshaft installer bolt 2: PN90890-01275 Crankshaft installer set