TROUBLESHOOTING
9-5
Clutch drags
Faulty clutch spring
Replace the clutch spring.
Warped pressure plate
Replace the pressure plate.
Swollen friction plate
Replace the friction plates as a
set.
Warped clutch plate
Replace the clutch plates as a set.
Bent pull rod (outer pull type)
Replace the pull rod.
Worn pull rod tooth (outer pull
type)
Replace the pull rod and pull lever
shaft as a set.
Bent push rod (inner push type)
Replace the push rod.
Damaged or worn sleeve
Replace the sleeve.
Seized primary driven gear bush-
ing
Replace the primary driven gear.
Improperly installed pull lever
Align the match mark on the pull
lever before installation.
Incorrect oil level
Adjust the engine oil level to the
specified level.
Incorrect oil viscosity (high)
Change to recommended engine
oil.
Deteriorated oil
Change to recommended engine
oil.
Clutch noise
Damaged or worn primary driven
gear
Replace the primary drive gear or
crankshaft, and the primary driven
gear as a set.
Loose clutch boss nut
Tighten the clutch boss nut to the
specified torque.
Fatigued absorber
Replace the absorber.
Worn clutch housing bearing
Replace the clutch housing bear-
ing.
Worn pressure plate bearing
Replace the pressure plate bear-
ing.
Symptom
Possible cause
Actions
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...