Kawasaki KX250F - Owner's Manual - Troubleshooting Guide
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TROUBLESHOOTING GUIDE
NOTE
○
This troubleshooting guide is not exhaustive and
does not give every possible cause for each prob-
lem listed. It is meant simply as a quick guide to
assist you in troubleshooting for some of the more
common difficulties.
Starting failure or difficulties -
Engine does not turn over:
•
Valve seized
•
Valve lifter seized
•
Cylinder or piston seized
•
Crankshaft seized
•
Connecting rod small end seized
•
Connecting rod big end seized
•
Camshaft seized
•
Transmission gear or bearing seized
•
Kick shaft return spring broken
•
Kick ratchet gear not engaging
•
Improper installation of vehicle-down sensor
Fuel does not flow:
•
No fuel in tank
•
Fuel tank cap air vent obstructed
•
Fuel line clogged
•
Break down of a fuel pump
•
Break down of a upstream injector and/or down-
stream injector
Spark missing or weak:
•
Spark plug dirty, broken, or gap improperly ad-
justed
•
Spark plug cap or high-tension wiring defective
•
Spark plug cap not contacting properly
•
Spark plug type incorrect
•
Crankshaft sensor defective
•
ECU defective
•
Ignition coil defective
•
Engine stop button wiring defective
•
Flywheel magneto damaged
•
Wiring shorted or interrupted
Fuel/air mixture incorrect:
•
Air cleaner element clogged, poorly sealed, or not
installed
Compression low:
•
Spark plug loose
•
Cylinder head insufficiently tightened
•
Cylinder bolt loose
•
Cylinder or piston worn
•
No valve clearance
•
Crankshaft oil seal leak
•
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