CHASSIS
3-29
5. Install:
•
Upper bracket
Refer to “STEERING HEAD” on page 4-58.
•
Handlebar
Refer to “HANDLEBAR” on page 4-39.
EAM30502
LUBRICATING THE STEERING HEAD
1. Lubricate:
•
Upper bearing
•
Lower bearing
•
Bearing race
EAM30338
CHECKING THE FRONT FORK LEGS
1. Stand the vehicle upright on a level surface.
WARNING
EWA13120
Securely support the vehicle so that there is
no danger of it falling over.
2. Check:
•
Inner tube
Damage/scratches
Replace.
•
Front fork leg
Oil leaks between inner tube and outer tube
Replace the oil seal.
3. Hold the vehicle upright and apply the front
brake.
4. Check:
•
Front fork operation
Push down hard on the handlebar several
times and check if the front fork rebounds
smoothly.
Unsmooth operation
Correct or replace.
Refer to “FRONT FORK” on page 4-46.
5. Check:
•
Protector guide “1”
Out of specification
Replace.
TIP
The protector guide reaches the limit of its use
when it is worn down to the same height “a” as
of the outer tube circumference.
6. Remove:
•
Protector
•
Dust seal “1”
NOTICE
ECA24330
Be careful not to damage the dust seal and
the inner tube by a driver.
7. Clean:
•
Dust seal “a”
•
Oil seal “b”
TIP
•
Clean the dust seal and oil seal after every run.
•
Apply lithium-soap-based grease on the inner
tube.
EAM30239
ADJUSTING THE FRONT FORK LEGS
WARNING
EWA19180
• Always adjust the left and right front forks
evenly. If this is not done, the vehicle may
Recommended lubricant
Lithium-soap-based grease
1
1
a
1
LS
a
b
Summary of Contents for YZ450FP 2023
Page 6: ...EAM20162 YAMAHA MOTOR CORPORATION U S A YZ MOTORCYCLE LIMITED WARRANTY...
Page 10: ......
Page 44: ...MOTORCYCLE CARE AND STORAGE 1 32...
Page 61: ...TIGHTENING TORQUES 2 16...
Page 72: ...CABLE ROUTING DIAGRAM 2 27 Frame and battery top view 2 1 B 5 4 3 A 7 4 E 6 D 2 3 C...
Page 76: ...CABLE ROUTING DIAGRAM 2 31...
Page 154: ...REAR BRAKE 4 38 system Refer to BLEEDING THE HYDRAULIC BRAKE SYSTEM on page 3 26...
Page 194: ...CHAIN DRIVE 4 78...
Page 278: ...TRANSMISSION 5 82...
Page 300: ...IGNITION SYSTEM 8 1 EAM20142 IGNITION SYSTEM EAM30277 CIRCUIT DIAGRAM...
Page 305: ...IGNITION SYSTEM 8 6...
Page 306: ...ELECTRIC STARTING SYSTEM 8 7 EAM20143 ELECTRIC STARTING SYSTEM EAM30279 CIRCUIT DIAGRAM...
Page 310: ...CHARGING SYSTEM 8 11 EAM20144 CHARGING SYSTEM EAM30282 CIRCUIT DIAGRAM...
Page 313: ...CHARGING SYSTEM 8 14...
Page 314: ...FUEL INJECTION SYSTEM 8 15 EAM20145 FUEL INJECTION SYSTEM EAM30284 CIRCUIT DIAGRAM B...
Page 339: ...FUEL INJECTION SYSTEM 8 40...
Page 340: ...FUEL PUMP SYSTEM 8 41 EAM20146 FUEL PUMP SYSTEM EAM30287 CIRCUIT DIAGRAM...
Page 356: ...ELECTRICAL COMPONENTS 8 57...
Page 372: ...SELF DIAGNOSTIC FUNCTION AND DIAGNOSTIC CODE TABLE 9 15...
Page 382: ...CHASSIS 10 9...
Page 384: ......
Page 386: ......
Page 387: ...B YZ450FP 2023 WIRING DIAGRAM BHR 2819U 10_W D indd 1 2022 08 09 13 16 06...