2002 Yamaha YFM660 Grizzly factory service and repair manual, Page 218Get this manual
CRANKSHAFT AND OIL PUMP
CHECKING THE RELIEF VALVE 1.Check: Relief valve body Relief valve Spring O-ring Damagewear Replace the defective parts(s)
CRANKSHAFT AND OIL PUMP
CHECKING THE RELIEF VALVE 1.Check: Relief valve body Relief valve Spring O-ring Damagewear Replace the defective parts(s)