2001 Yamaha YFM660 Raptor Factory Service Manual, Page 246Get this manual

2001 Yamaha YFM660 Raptor Factory Service Manual, Page 246

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CRANKCASE ENG
CAUTION:
Use soft hammer to tap on one side of the crankcaseTap only on reinforced portions of the crankcaseDo not tap on the crankcase mating surfacesWork slowly and careful