Yamaha YZ450F Owner's Service Manual page 84

CHECKING THE WHEEL BEARINGS .....................................................3-34
CHECKING AND ADJUSTING THE STEERING HEAD ..........................3-35
LUBRICATING THE LEVERS ..................................................................3-36
LUBRICATING THE PEDAL ....................................................................3-36
ELECTRICAL SYSTEM..................................................................................3-37
CHECKING THE SPARK PLUG ..............................................................3-37
CHECKING THE IGNITION TIMING........................................................3-37