1991+ Kawasaki 650 SC Factory Service Manual, Page 185Get this manual
APPENDIX 15-5
1 ,-;, Ignition System 7
Spark plug gap or heat range wrong Ignition timing wrong Reduced ignition coil output Loose wiring connection in ignition circuit Insufficient fuel supply to carburetor Carburetor diaphragm damaged Pulse line leaking or clogged High speed nozzle clogged Throttle valve does not fully open Fuel filter screen clogged Faulty fuel pump Flame arrester clogged Muffler or exhaust system clogged Water or foreign matter in gasoline or engine oil Exhaust gas leak in engine compartment
Fuel System
Low engine PowerThis trouble often has more than one cause, and trouble symptoms may not be clear
1 '-4- Other 4
Overheating
Ignition wrong Carburetor not adjusted Flame arrester or exhaust system clogged Carbon accumulation in combustion chamber Wrong type of gasoline or oil Obstruction in oil pump hoses Cooling water line leaking or clogged Carburetor not adjusted Flame arrester clogged Muffler or exhaust system clogged Worn cylinder, piston or piston ring Fuel feed line leaking Carburetor diaphragm needle dirty or damaged