2002 Yamaha YFM660 Grizzly factory service and repair manual, Page 238Get this manual
MIDDLE GEAR 2.Install: Bearing retainer 1
Installation steps: Attach the folded rag 2Secure the bearing housing edge in the viseAttach the bearing retainer wrench 3Bearing retainer wrench: PNYM-04128, 90890-04128
Tighten
the bearing retainer