Faulty Y.p.v.s; Overheating Or Overcooling; Overheating; Overcooling - Yamaha DT125RE 2005 Service Manual

FAULTY Y.P.V.S.

• Power valve
• Control cable
• Electrical parts
OVERHEATING OR OVER-COOLING

OVERHEATING

• Ignition system
• Fuel system
• Compression system
• Transmission oil
• Brake
• Cooling system
OVER-COOLING
• Cooling system
TROUBLESHOOTING
PROBABLE CAUSE
• Seized or damaged power valve
• Carbon build-up
• Improperly adjusted cable
• Seized or discontinuous cable
• Insufficient battery capacity
(improperly charged battery)
• Faulty main switch
• Faulty servomotor
• Faulty CDI unit
• Faulty Y.P.V.S. control unit
• Broken or shorted wiring
PROBABLE CAUSE
• Improper spark plug gap
• Improper spark plug heat range
• Faulty CDI unit
• Improper carburator main jet
(improper setting)
• Improperly adjusted fuel heigh
• Clogged air cleaner element
• Lean mixture (Faulty Autolube pump
settings)
• Heavy carbon build-up
• Incorrect oil level
• Improper oil viscosity
• Inferior oil quality
• Dragging bike
• Faulty water temperature gauge
• Faulty thermo-unit
• Incorrect coolant level
• Faulty thermostat valve
• Clogged or damaged radiator
• Faulty radiator cap
• Seized impeller shaft
PROBABLE CAUSE
• Faulty water temperature gauge
• Faulty thermo-unit
• Faulty thermostat valve
9-9
TRBL
SHTG