Overheating; Engine; Cooling System; Fuel System - Yamaha YP400T, YP400V, YP400W Service Manual
2005-2007 years
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Also See for YP400T, YP400V, YP400W:
- Owner's manual (101 pages) ,
- Service manual (387 pages)
Table of Contents
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EAS00855
OVERHEATING
ENGINE
Clogged coolant passages
• Cylinder head and piston
• Heavy carbon buildup
Engine oil
• Incorrect oil level
• Incorrect oil viscosity
• Inferior oil quality
COOLING SYSTEM
Coolant
• Low coolant level
Radiator
• Damaged or leaking radiator
• Faulty radiator cap
• Bent or damaged radiator fin
Water pump
• Damaged or faulty water pump
• Thermostat
• Thermostat stays closed
• Oil cooler
• Hose(s) and pipe(s)
• Damaged hose
• Improperly connected hose
• Damaged pipe
• Improperly connected pipe
EAS00856
OVERCOOLING
COOLING SYSTEM
Thermostat
• Thermostat stays open
OVERHEATING/
OVERCOOLING
FUEL SYSTEM
Throttle body
• Damaged or loose throttle body joint
Air filter
• Clogged air filter element
CHASSIS
Brake(s)
• Dragging brake
ELECTRICAL SYSTEMS
Spark plug
• Incorrect spark plug gap
• Incorrect spark plug heat range
Ignition system
• Faulty radiator fan motor relay
• Faulty coolant temperature sensor
• Faulty ECU
9 - 4
TRBL
SHTG
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Troubleshooting
