TROUBLESHOOTING
8-1
EAM20148
TROUBLESHOOTING
EAM30309
GENERAL INFORMATION
TIP
•
Troubleshooting information provided here does not cover all the trouble symptoms, possible causes,
and remedial actions. Some items may not apply depending on the model. Use this information as a
guide and quick reference matrix when performing basic troubleshooting. Refer to the each chapter
for detailed information on checking, adjustment, and replacement.
•
The following guide for troubleshooting represent quick and easy procedures for checking these vital
systems yourself. However, should your motorcycle require any repair, take it to a Yamaha dealer,
whose skilled technicians have the necessary tools, experience, and know-how to service the motor-
cycle properly.
EAM30509
TROUBLESHOOTING OF ENGINE (fault code not detected)
TIP
If a fault code is detected, have a Yamaha dealer check the electrical system.
Engine does not crank.
Engine will not start or is difficult to start, but it cranks.
Symptom
Possible cause
Actions
Starter motor does not operate
Have a Yamaha dealer check the electrical system.
Starter motor operates, but the
engine does not crank.
Starter clutch malfunction
Replace the starter clutch.
Improper oil grade (starter clutch
slipping)
Change to recommended engine
oil.
Stuck piston or seized crankshaft
Disassemble and check the
engine. Replace defective parts.
Symptom
Possible cause
Actions
Spark plug does not produce a
spark
Have a Yamaha dealer check the electrical system.
Fuel not supplied
—
Measure the fuel pressure.
Empty fuel tank
Fill the fuel tank with fuel.
Clogged fuel tank cap breather
hole
Clean the fuel tank cap.
Clogged or damaged fuel hose
Clean, repair, or replace the fuel
hose.
Fuel leakage
Check the fuel passage. Repair or
replace as necessary.
Clogged fuel pump
Clean or replace the fuel pump.
Cracks or damage in fuel pump
Replace the fuel pump.
Fuel pump malfunction
Have a Yamaha dealer check the
electrical system.
Failed or clogged fuel injector
Replace the fuel injector.
ECU failure
Replace the ECU.
Содержание YZ450FX 2023
Страница 8: ......
Страница 10: ...MOTORCYCLE CARE AND STORAGE 1 20 CARE 1 20 STORAGE 1 21 ...
Страница 15: ...LOCATION OF IMPORTANT LABELS 1 5 ...
Страница 16: ...LOCATION OF IMPORTANT LABELS 1 6 AUS NZL ZAF 4AA 22259 40 ...
Страница 80: ...ELECTRICAL SYSTEM 3 32 ...
Страница 96: ...HANDLEBAR 4 14 Throttle grip free play 3 0 6 0 mm 0 12 0 24 in ...
Страница 116: ...CHAIN DRIVE 4 34 ...
Страница 124: ...CLUTCH 5 7 ...
Страница 125: ...1 2 3 4 5 6 7 8 9 10 FUEL SYSTEM FUEL TANK 6 1 REMOVING THE FUEL TANK 6 1 INSTALLING THE FUEL TANK 6 1 ...
Страница 128: ...FUEL TANK 6 3 ...
Страница 148: ...SELF DIAGNOSTIC FUNCTION AND DIAGNOSTIC CODE TABLE 8 13 ...
Страница 158: ...CHASSIS 9 9 ...
Страница 160: ...PRINTED IN JAPAN E ...
Страница 163: ...YZ450FXP 2023 WIRING DIAGRAM YZ450FXP 2023 SCHÉMA DE CÂBLAGE BEX 2819U 72_W D indd 1 2022 05 23 10 21 48 ...
Страница 164: ...YZ450FXP 2023 WIRING DIAGRAM YZ450FXP 2023 SCHÉMA DE CÂBLAGE BEX 2819U 72_W D indd 2 2022 05 23 10 21 48 ...