Yamaha YZ450F 2021 - Periodic Checks and Adjustments

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PERIODIC CHECKS AND ADJUSTMENTS
MAINTENANCE INTERVALS...........................................................................3-1
MAINTENANCE INTERVALS.....................................................................3-1
PRE-OPERATION INSPECTION AND MAINTENANCE .................................3-5
GENERAL INSPECTION AND MAINTENANCE........................................3-5
ENGINE.............................................................................................................3-6
ADJUSTING THE VALVE CLEARANCE....................................................3-6
VALVE CLEARANCE SHIM CHART..........................................................3-9
CHECKING THE ENGINE IDLING SPEED..............................................3-11
CHECKING THE THROTTLE GRIP.........................................................3-11
CHECKING THE SPARK PLUG...............................................................3-12
CHECKING THE ENGINE OIL LEVEL.....................................................3-13
CHANGING THE ENGINE OIL.................................................................3-13
ADJUSTING THE CLUTCH LEVER FREE PLAY ....................................3-15
ADJUSTING THE CLUTCH LEVER POSITION.......................................3-15
CLEANING THE AIR FILTER ELEMENT.................................................3-15
CHECKING THE THROTTLE BODY JOINT ............................................3-17
CHECKING THE FUEL LINE ...................................................................3-17
CHECKING THE CYLINDER HEAD BREATHER HOSE.........................3-18
CHECKING THE EXHAUST SYSTEM.....................................................3-18
CHECKING THE COOLANT LEVEL ........................................................3-20
CHECKING THE COOLING SYSTEM .....................................................3-21
CHANGING THE COOLANT....................................................................3-21
CHASSIS ........................................................................................................3-23
ADJUSTING THE FRONT DISC BRAKE .................................................3-23
ADJUSTING THE REAR DISC BRAKE ...................................................3-23
CHECKING THE BRAKE FLUID LEVEL..................................................3-24
CHECKING THE FRONT BRAKE PADS .................................................3-24
CHECKING THE REAR BRAKE PADS....................................................3-24
CHECKING THE FRONT BRAKE HOSE.................................................3-24
CHECKING THE REAR BRAKE HOSE ...................................................3-25
CHECKING THE BRAKE OPERATION ...................................................3-25
BLEEDING THE HYDRAULIC BRAKE SYSTEM.....................................3-25
DRIVE CHAIN SLACK..............................................................................3-26
CHECKING AND ADJUSTING THE STEERING HEAD ..........................3-27
LUBRICATING THE STEERING HEAD ...................................................3-28
CHECKING THE FRONT FORK LEGS....................................................3-28
ADJUSTING THE FRONT FORK LEGS ..................................................3-28
CHECKING THE REAR SHOCK ABSORBER ASSEMBLY.....................3-30
ADJUSTING THE REAR SHOCK ABSORBER ASSEMBLY ...................3-30
CHECKING THE SWINGARM OPERATION ...........................................3-32
LUBRICATING THE SWINGARM PIVOT ................................................3-32
CHECKING THE CONNECTING ARM AND RELAY ARM ......................3-32
CHECKING THE TIRES ...........................................................................3-32
CHECKING AND TIGHTENING THE SPOKES .......................................3-33
CHECKING THE WHEELS ......................................................................3-33