1985-1990 Suzuki LT50 Service Manual, Page 81Get this manual

1985-1990 Suzuki LT50 Service Manual, Page 81

SERVICING INFORMATION ENGINE MAKES ABNORMAL NOISE SymPtom Possible cause Noise pitch is raised generally in step with increasing
dirty cylinder cooling fins or poor working condition of the cooling and oiling systemBefore proceeding as listed below,
make sure that the brake is not dragging and also that the cooling fins are clean StepSymptom Engine overheats in all speed
ranges Possible cause (1) Poor lubrication due to: 1) Defective oil pump or drive gears2) Air trapped in the oil line3) Clogged
oil ta nk cap breather hole4Wrong oil used(2) Too high "compression pressure" due to:Excessive carbon deposits in combustion
chamber 21 Cylinder head gasket too thin 3) Exhaust portmufller or pipe is clogged With carbon J Replace 121 Drive air out
by purging131 Clear141 Use prescribed oil (1) De carbon(2) Replace(3) De-carbon 131 Piston rings are stuck stiff In place