2002 Yamaha YFM660 Grizzly factory service and repair manual, Page 142Get this manual
CHECKING THE FUSEADJUSTING THE HEADLIGHT BEAM CHANGING THE HEADLIGHT BULB
4.Install: Seat Refer to "SEAT, CARRIERS, FENDERS AND FUEL TANK"
ADJUSTING THE HEADLIGHT BEAM 1.Adjust: Headlight beam (vertically) Turn the adjuster in or outTurning in Headlight beam raised