Yamaha WR250F 2023 Owner's Manual page 57

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
CHECKING THE ENGINE IDLING SPEED ...............................................3-8
CHECKING THE THROTTLE GRIP...........................................................3-8
CHECKING THE SPARK PLUG ................................................................3-9
CHECKING THE ENGINE OIL LEVEL.....................................................3-10
CHANGING THE ENGINE OIL ................................................................3-10
ADJUSTING THE CLUTCH LEVER FREE PLAY....................................3-12
CLEANING THE AIR FILTER ELEMENT.................................................3-13
CHECKING THE THROTTLE BODY JOINT............................................3-14
CHECKING THE FUEL LINE ...................................................................3-14
CHECKING THE CYLINDER HEAD BREATHER HOSE ........................3-15
CHECKING THE EXHAUST SYSTEM.....................................................3-15
CHECKING THE COOLANT LEVEL........................................................3-16
CHECKING THE COOLING SYSTEM .....................................................3-17
CHANGING THE COOLANT....................................................................3-17
CHASSIS ........................................................................................................3-19
ADJUSTING THE FRONT DISC BRAKE.................................................3-19
ADJUSTING THE REAR DISC BRAKE ...................................................3-19
CHECKING THE BRAKE FLUID LEVEL..................................................3-19
CHECKING THE FRONT BRAKE PADS .................................................3-20
CHECKING THE REAR BRAKE PADS ...................................................3-20
CHECKING THE FRONT BRAKE HOSE.................................................3-20
CHECKING THE REAR BRAKE HOSE ...................................................3-20
CHECKING THE BRAKE OPERATION ...................................................3-21
BLEEDING THE HYDRAULIC BRAKE SYSTEM ....................................3-21
DRIVE CHAIN SLACK..............................................................................3-22
LUBRICATING THE DRIVE CHAIN .........................................................3-22
CHECKING AND ADJUSTING THE STEERING HEAD ..........................3-23
LUBRICATING THE STEERING HEAD...................................................3-24
CHECKING THE FRONT FORK LEGS ...................................................3-24
ADJUSTING THE FRONT FORK LEGS ..................................................3-25
CHECKING THE REAR SHOCK ABSORBER ASSEMBLY ....................3-26
ADJUSTING THE REAR SHOCK ABSORBER ASSEMBLY...................3-26
CHECKING THE SWINGARM OPERATION ...........................................3-28
LUBRICATING THE SWINGARM PIVOT ................................................3-28
CHECKING THE TIRES...........................................................................3-28
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