2002 Yamaha YFM660 Grizzly factory service and repair manual, Page 190Get this manual
BALANCER GEARS AND OIL PUMP GEARS BALANCER GEARS AND OIL PUMP GEARS
Job namePart name Removing the balancer gears and oil pump gears Starter wheel gear Nutlock washer Balancer drivenoil pump drive gear Chain Straight key Oil pump driven gear Plate Balancer drive gear Spring Pin Buffer boss