2007-2010 Kawasaki Ultra 250X/260X/260LX PWC Factory Service Manual, Page 527Get this manual
APPENDIX 16-75 Troubleshooting Guide
Fuel injector trouble Water or foreign matter in fuel Throttle sensor trouble Fuel pressure may be low Fuel pump trouble Inlet air pressure sensor trouble Inlet air temperature sensor trouble Water temperature sensor trouble Crankshaft sensor trouble Compression Low Spark plug loose Cylinder head not sufficiently tightened down No valve clearance Cylinder, piston worn Piston ring bad (wornweakbrokenor sticking) Piston ringgroove clearance excessive Cylinder head gasket damaged Cylinder head warped Valve spring broken or weak Valve not seating properly (valve bent, wornor carbon accumulation on the seating surface)
Poor Running at Low Speed
Spark weak Battery voltage low Spark plug dirty, brokenor maladjusted Ignition coil shorted or not in good contact Ignition coil trouble Spark plug incorrect Spark plug cap trouble Spark plug cap shorted or not in good contact IC igniter in ECU trouble Camshaft position sensor trouble Crankshaft sensor trouble Fuelair mixture incorrect Air passage clogged Air filter poorly sealed Air bypass system (relief valveblow off valve) malfunction Fuel tank air vent obstructed Fuel pump trouble Inlet air duct loose Fuel pump screen andor fuel filter clogged Throttle body assy loose Throttle body assy gasket damage Fuel line clogged Inlet air pressure sensor trouble Inlet air temperature sensor trouble Engine stalls easily Fuel pump trouble Fuel injector trouble Throttle sensor trouble Camshaft position sensor trouble Fuel pressure too low or too high Inlet air pressure sensor trouble Water temperature sensor trouble Inlet air temperature sensor trouble Fuel line clogged Crankshaft sensor trouble