2009 Suzuki 400 LTZ Quad Sport Service Manual, Page 210Get this manual
Engine Lubrication System:
Diagnostic Information and Procedures
Engine Lubrication Symptom Diagnosis
Possible cause Insufficient amount of engine oilDefective oil pumpClogged oil circuitIncorrect engine oilExhaust smoke is dirty or Excessive amount of engine oilthick Engine lacks power Excessive amount of engine oilCondition Engine overheats
B933H21504001
CorrectionReference Item Check level and addReplaceCleanChangeCheck level and drainCheck level and drain2) Install the oil pressure gauge and attachment into the main oil gallery3) Connect the tachometer to the high-tension cordSpecial tool (A): 0991574511 (Oil pressure gauge set) (B): 0991574533 (Oil pressure gauge attachment)0990026006 (Engine tachometer (solar cell type))
Oil Pressure Check