2002 Yamaha YFM660 Grizzly factory service and repair manual, Page 95Get this manual
ADJUSTING THE THROTTLE LEVER FREE PLAY
1.Check: Throttle lever free play Out of specification AdjustThrottle lever free play:mm (0.120.20 in)
2.Remove: Seat Fuel tank side panel (right) Refer to "SEAT, CARRIERS, FENDERS AND FUEL TANK"