Yamaha YZ250 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 .................................3-4
GENERAL INSPECTION AND MAINTENANCE........................................3-4
ENGINE.............................................................................................................3-5
ADJUSTING THE PILOT AIR SCREW ......................................................3-5
CHECKING THE ENGINE IDLING SPEED................................................3-5
CHECKING THE THROTTLE GRIP...........................................................3-5
CHECKING THE SPARK PLUG.................................................................3-5
CHECKING THE TRANSMISSION OIL LEVEL .........................................3-6
CHANGING THE TRANSMISSION OIL .....................................................3-6
ADJUSTING THE CLUTCH LEVER FREE PLAY ......................................3-7
ADJUSTING THE CLUTCH LEVER POSITION.........................................3-8
CLEANING THE AIR FILTER ELEMENT...................................................3-8
CHECKING THE CARBURETOR JOINT ...................................................3-9
CHECKING THE CARBURETOR HOSES.................................................3-9
CHECKING THE EXHAUST SYSTEM.......................................................3-9
CHECKING THE COOLANT LEVEL ........................................................3-10
CHECKING THE COOLING SYSTEM .....................................................3-11
CHANGING THE COOLANT....................................................................3-11
CHASSIS ........................................................................................................3-13
ADJUSTING THE FRONT DISC BRAKE .................................................3-13
ADJUSTING THE REAR DISC BRAKE ...................................................3-13
CHECKING THE BRAKE FLUID LEVEL..................................................3-14
CHECKING THE FRONT BRAKE PADS .................................................3-14
CHECKING THE REAR BRAKE PADS....................................................3-15
CHECKING THE FRONT BRAKE HOSE.................................................3-15
CHECKING THE REAR BRAKE HOSE ...................................................3-15
CHECKING THE BRAKE OPERATION ...................................................3-15
BLEEDING THE HYDRAULIC BRAKE SYSTEM.....................................3-15
DRIVE CHAIN SLACK..............................................................................3-16
LUBRICATING THE DRIVE CHAIN .........................................................3-17
CHECKING AND ADJUSTING THE STEERING HEAD ..........................3-17
LUBRICATING THE STEERING HEAD ...................................................3-18
CHECKING THE FRONT FORK LEGS....................................................3-18
ADJUSTING THE FRONT FORK LEGS ..................................................3-19
CHECKING THE REAR SHOCK ABSORBER ASSEMBLY.....................3-20
ADJUSTING THE REAR SHOCK ABSORBER ASSEMBLY ...................3-21
CHECKING THE SWINGARM OPERATION ...........................................3-23
LUBRICATING THE SWINGARM PIVOT ................................................3-23
CHECKING THE TIRES ...........................................................................3-23
CHECKING AND TIGHTENING THE SPOKES .......................................3-23
CHECKING THE WHEELS ......................................................................3-24
CHECKING THE CHASSIS FASTENERS ...............................................3-24
CHECKING AND LUBRICATING THE CABLES......................................3-24