TROUBLESHOOTING
9-7
EAM30512
TROUBLESHOOTING OF COOLING SYSTEM
Symptom
Possible cause
Actions
Overheating
Carbon buildup in piston head and
combustion chamber
Clean the piston head and com-
bustion chamber.
Clogged engine cooling water
passages
Check and clean the engine cool-
ing water passages.
Incorrect oil level
Adjust the oil level to the specified
level.
Incorrect oil viscosity
Change to recommended engine
oil.
Inferior oil quality
Change to recommended engine
oil.
Low coolant level
Add recommended coolant to the
specified level.
Damaged or leaking radiator
Replace the radiator.
Faulty radiator cap
Replace the radiator cap.
Clogged radiator fin
Clean the radiator fin.
Bent or damaged radiator fin
Repair the radiator fin or replace
the radiator.
Damaged or faulty water pump
Replace the water pump.
Damaged hoses or pipes
Replace the hose or pipe.
Improperly connected hoses or
pipes
Connect the hoses and pipes
properly.
Damaged throttle body joint
Replace the throttle body joint.
Loose throttle body joint
Tighten the throttle body joint bolts
to the specified torque.
Clogged air filter element
Clean or replace the air filter ele-
ment.
Brake drags
Check the brake system and
repair or replace faulty parts as
necessary.
Incorrect spark plug gap
Adjust to the specified spark plug
gap.
Incorrect spark plug heat range
Replace the spark plug with the
one of the specified type.
Faulty ECU
Replace the ECU.
Noise from water pump
Contact between the water pump
housing cover and impeller
Disassemble the water pump and
replace faulty parts.
Worn water pump housing bearing Replace the water pump housing
bearing.
Summary of Contents for YZ450FX 2022
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 62: ...CABLE ROUTING DIAGRAM 2 17 EAM20152 CABLE ROUTING DIAGRAM Frame and engine left side view ...
Page 64: ...CABLE ROUTING DIAGRAM 2 19 Frame and engine right side view ...
Page 66: ...CABLE ROUTING DIAGRAM 2 21 Handlebar front view ...
Page 68: ...CABLE ROUTING DIAGRAM 2 23 Frame and engine top view ...
Page 70: ...CABLE ROUTING DIAGRAM 2 25 Frame and battery top view ...
Page 72: ...CABLE ROUTING DIAGRAM 2 27 Rear brake right side view ...
Page 74: ...CABLE ROUTING DIAGRAM 2 29 ...
Page 112: ...ELECTRICAL SYSTEM 3 36 ...
Page 154: ...HANDLEBAR 4 40 Throttle grip free play 3 0 6 0 mm 0 12 0 24 in ...
Page 189: ...LUBRICATION SYSTEM CHART AND DIAGRAMS 5 3 1 Connecting rod 2 Oil nozzle 3 Crankshaft ...
Page 191: ...LUBRICATION SYSTEM CHART AND DIAGRAMS 5 5 1 Oil filter element 2 Oil pump 3 Oil strainer ...
Page 270: ...WATER PUMP 6 9 ...
Page 280: ...THROTTLE BODY 7 9 ...
Page 283: ......
Page 284: ...IGNITION SYSTEM 8 1 EAM20142 IGNITION SYSTEM EAM30277 CIRCUIT DIAGRAM ...
Page 288: ...ELECTRIC STARTING SYSTEM 8 5 EAM20143 ELECTRIC STARTING SYSTEM EAM30279 CIRCUIT DIAGRAM ...
Page 292: ...CHARGING SYSTEM 8 9 EAM20144 CHARGING SYSTEM EAM30282 CIRCUIT DIAGRAM ...
Page 295: ...CHARGING SYSTEM 8 12 ...
Page 296: ...SIGNALING SYSTEM 8 13 EAM20154 SIGNALING SYSTEM EAM30348 CIRCUIT DIAGRAM ...
Page 300: ...FUEL INJECTION SYSTEM 8 17 EAM20145 FUEL INJECTION SYSTEM EAM30284 CIRCUIT DIAGRAM ...
Page 325: ...FUEL INJECTION SYSTEM 8 42 ...
Page 326: ...FUEL PUMP SYSTEM 8 43 EAM20146 FUEL PUMP SYSTEM EAM30287 CIRCUIT DIAGRAM ...
Page 358: ...SELF DIAGNOSTIC FUNCTION AND DIAGNOSTIC CODE TABLE 9 15 ...
Page 368: ...CHASSIS 10 9 ...
Page 370: ......
Page 372: ......
Page 373: ...YZ450FXN 2022 WIRING DIAGRAM BEX 2819U 11_W D indd 1 2021 05 06 15 18 37 ...
Page 374: ...YZ450FXN 2022 WIRING DIAGRAM BEX 2819U 11_W D indd 2 2021 05 06 15 18 37 ...