Yamaha WR250F 2021 - PERIODIC CHECKS AND ADJUSTMENTS

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PERIODIC CHECKS AND ADJUSTMENTS
PERIODIC MAINTENANCE .............................................................................3-1
INTRODUCTION ........................................................................................3-1
PERIODIC MAINTENANCE CHART FOR THE EMISSION CONTROL
SYSTEM ....................................................................................................3-1
GENERAL MAINTENANCE AND LUBRICATION CHART ........................3-1
MAINTENANCE INTERVALS FOR COMPETITION USE..........................3-3
PRE-OPERATION INSPECTION AND MAINTENANCE .................................3-6
GENERAL INSPECTION AND MAINTENANCE........................................3-6
ENGINE.............................................................................................................3-7
ADJUSTING THE VALVE CLEARANCE....................................................3-7
VALVE CLEARANCE SHIM CHART........................................................3-10
CHECKING THE ENGINE IDLING SPEED..............................................3-12
CHECKING THE THROTTLE GRIP.........................................................3-12
CHECKING THE SPARK PLUG...............................................................3-13
CHECKING THE ENGINE OIL LEVEL.....................................................3-14
CHANGING THE ENGINE OIL.................................................................3-14
ADJUSTING THE CLUTCH LEVER FREE PLAY ....................................3-16
CLEANING THE AIR FILTER ELEMENT.................................................3-16
CHECKING THE THROTTLE BODY JOINT ............................................3-18
CHECKING THE FUEL LINE ...................................................................3-18
CHECKING THE CYLINDER HEAD BREATHER HOSE.........................3-18
CHECKING THE EXHAUST SYSTEM.....................................................3-19
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
LUBRICATING THE DRIVE CHAIN .........................................................3-27
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 ..................................................3-29
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