Yamaha YZ 2019 Series, Owner'S Service Manual, Page: 87 / 398

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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
.............................................................................................................3-7
CHECKING THE COOLANT LEVEL ..........................................................3-7
CHECKING THE COOLING SYSTEM .......................................................3-7
CHANGING THE COOLANT......................................................................3-7
CHECKING THE RADIATOR CAP.............................................................3-8
CHECKING THE RADIATOR CAP VALVE OPENING PRESSURE..........3-8
CHECKING THE COOLANT CIRCULATORY SYSTEM FOR LEAKS.......3-9
ADJUSTING THE CLUTCH LEVER FREE PLAY ......................................3-9
ADJUSTING THE THROTTLE GRIP FREE PLAY...................................3-10
LUBRICATING THE THROTTLE CABLE.................................................3-10
CLEANING THE AIR FILTER ELEMENT.................................................3-11
CHECKING THE THROTTLE BODY JOINT ............................................3-12
CHECKING THE BREATHER HOSES ....................................................3-12
CHECKING THE EXHAUST SYSTEM.....................................................3-12
CHECKING THE FUEL LINE ...................................................................3-13
CHECKING THE ENGINE OIL LEVEL.....................................................3-13
CHANGING THE ENGINE OIL.................................................................3-14
ADJUSTING THE ENGINE IDLING SPEED ............................................3-15
ADJUSTING THE VALVE CLEARANCE..................................................3-16
VALVE CLEARANCE SHIM CHART........................................................3-19
CHASSIS
........................................................................................................3-21
BLEEDING THE BRAKE SYSTEM ..........................................................3-21
CHECKING THE BRAKE HOSE ..............................................................3-22
ADJUSTING THE FRONT BRAKE...........................................................3-22
ADJUSTING THE REAR BRAKE .............................................................3-23
CHECKING THE FRONT BRAKE PADS .................................................3-23
CHECKING THE REAR BRAKE PADS....................................................3-25
CHECKING THE REAR BRAKE PAD INSULATOR.................................3-26
CHECKING THE BRAKE FLUID LEVEL..................................................3-26
ADJUSTING THE DRIVE CHAIN SLACK ................................................3-27
CHECKING THE FRONT FORK LEGS....................................................3-28
CHECKING THE FRONT FORK PROTECTOR GUIDE ..........................3-28
CLEANING THE FRONT FORK OIL SEAL AND DUST SEAL ................3-28
AIR BLEEDING FROM FRONT FORK.....................................................3-29
ADJUSTING THE FRONT FORK LEGS ..................................................3-29
CHECKING THE SWINGARM OPERATION ...........................................3-30
CHECKING THE REAR SUSPENSION ...................................................3-30
ADJUSTING THE REAR SHOCK ABSORBER ASSEMBLY ...................3-30
CHECKING THE TIRES ...........................................................................3-32
CHECKING AND TIGHTENING THE SPOKES .......................................3-32
CHECKING THE WHEELS ......................................................................3-33