2006-2009 Suzuki LT-R450 Service Manual, Page 380Get this manual
SERVICING INFORMATION
Complaint Engine overheats
Symptom and possible causes Defective engine internal parts 1Heavy carbon deposit on piston crowns 2Not enough oil in the engine 3Defective oil pump or clogged oil circuit 4Sucking air from intake pipe 5Use incorrect engine oil 6Defective cooling system Lean fuelair mixture 1Short-circuited lAP sensorlead wire 2Short-circuited IAT sensorlead wire 3Sucking air from intake pipe joint 4Defective fuel injector 5Defective ECT sensor Other factors 1Ignition timing is too advanced due to defective timing advance system (ECT sensor, GP sensor, CKP sensor and ECM)2Drive chain is too tight1Too much engine oil in the engine
CleanAdd oilReplace or cleanRetighten or replaceChangeSee radiator section Repair or replaceRepair or replaceRepair or replaceReplaceReplaceReplace
AdjustCheck with inspection window, drain out excess oilReplaceReplaceReplaceReplaceReplaceReplaceReplaceReplaceReplaceReplaceReplaceReplaceReplaceReplaceReplaceRepair or replaceReplaceReplaceReplaceReplaceReplaceReplace