Kawasaki KX250F - Owner's Manual - page 180
179
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•
Cylinder head warped
•
Cylinder gasket damaged
•
Decompression trouble
Poor low-speed performance -
Spark weak:
•
Spark plug dirty, broken, or gap improperly ad-
justed
•
Spark plug cap or high-tension wiring defective
•
Spark plug cap shorted or not contacting properly
•
Spark plug type incorrect
•
Crankshaft sensor defective
•
ECU defective
•
Ignition coil defective
•
Flywheel magneto defective
•
Wiring connector not in good contact
Fuel/air mixture incorrect:
•
Air cleaner element clogged, poorly sealed, or not
installed
•
Fuel tank cap air vent obstructed
•
Throttle body assy holder loose
•
Air cleaner duct loose
•
Fuel pump defective
Compression low:
•
Spark plug loose
•
Cylinder head insufficiently tightened
•
Cylinder bolt loose
•
Cylinder or piston worn
•
No valve clearance
•
Valve spring broken or weak
•
Valve not seating properly (valve bent, worn, or
carbon accumulation on the seating surface)
•
Piston ring worn, weak, broken, or sticking
•
Piston ring side clearance excessive
•
Cylinder head gasket damaged
•
Cylinder head warped
•
Cylinder gasket damaged
•
Decompression trouble
Other:
•
ECU defective
•
Brake dragging
•
Clutch slipping
•
Engine overheating
•
Engine oil level too high
•
Engine oil viscosity too high
•
Drive chain trouble
Poor or no high-speed performance -
Firing incorrect:
•
Spark plug dirty, broken, or gap improperly ad-
justed
•
Spark plug cap or high-tension wiring defective
•
Spark plug cap shorted or not contacting properly
•
Spark plug type incorrect
•
ECU defective
•
Ignition coil defective
•
Crankshaft sensor defective
•
Flywheel magneto defective
•
Wiring connector not in good contact