1
2
3
4
5
6
7
8
9
10
PERIODIC CHECKS AND ADJUSTMENTS
...........................................................................3-1
MAINTENANCE INTERVALS.....................................................................3-1
PRE-OPERATION INSPECTION AND MAINTENANCE
.................................3-4
GENERAL INSPECTION AND MAINTENANCE........................................3-4
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
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
Summary of Contents for YZ250 2021
Page 5: ...EAM20162 YAMAHA MOTOR CORPORATION U S A YZ MOTORCYCLE LIMITED WARRANTY ...
Page 6: ......
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Page 10: ...MOTORCYCLE CARE AND STORAGE 1 16 CARE 1 16 STORAGE 1 17 ...
Page 42: ...TIGHTENING TORQUES 2 13 ...
Page 70: ...CHASSIS 3 26 ...
Page 106: ...CHAIN DRIVE 4 34 ...
Page 112: ...CLUTCH 5 5 ...
Page 113: ...1 2 3 4 5 6 7 8 9 10 ELECTRICAL SYSTEM WIRING DIAGRAM 6 1 COLOR CODE 6 1 ...
Page 128: ...TROUBLESHOOTING 7 13 ...
Page 146: ...CHASSIS 8 17 ...