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Troubleshooting Guide - Kawasaki KX450F Service Manual

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17-8 APPENDIX

Troubleshooting Guide

This is not an exhaustive list, giving every
possible cause for each problem listed. it is
meant simply as a rough guide to assist the
troubleshooting for some of the more common
difficulties.
Engine Doesn't Start, Starting
Difficulty:
Engine won't turn over:
Valve seizure
Valve lifter seizure
Cylinder, piston seizure
Crankshaft seizure
Connecting rod small end, big end seizure
Transmission gear or bearing seizure
Camshaft seizure
Kick shaft return spring broken
Kick ratchet gear not engaging
No fuel flow:
No fuel in tank
Fuel tank cap air vent obstructed
Fuel tap clogged
Fuel tap turned off
Fuel line clogged
Carburetor float valve clogged
Engine flooded:
Fuel level in carburetor float bowl too high
Float valve worn or jammed with foreign
matter
Starting technique faulty (When flooded,
crank the engine with the hot start opened
to allow more air to reach the engine.)
Fuel/air mixture incorrect:
Pilot screw and/or idle adjusting screw mal-
adjusted
Pilot jet or air passage clogged
Air cleaner clogged, poorly sealed, or miss-
ing
Starter jet clogged
No spark; spark weak:
Spark plug dirty, broken, or gap malad-
justed
Spark plug cap or high tension wiring trou-
ble
Spark plug cap shorted or not in good con-
tact
Spark plug incorrect heat value
Faulty CDI unit
Crankshaft sensor trouble
Ignition coil trouble
Engine stop switch shorted
Neutral switch trouble.
Wiring shorted or open
Flywheel damage
Compression Low:
Spark plug loose
Cylinder head not sufficiently tightened
down
No valve clearance
Cylinder, piston worn
Piston ring bad (worn, weak, broken, or
sticking)
Piston ring/groove clearance excessive
Cylinder head gasket damaged
Cylinder head warped
Valve spring broken or weak
Valve not seating properly (valve bent, de-
formed, worn, or carbon accumulation on
the seating surface)
Decompression trouble
Poor Running at Low Speed:
Spark weak:
Spark plug dirty, broken, or gap malad-
justed
Spark plug cap or high tension wiring trou-
ble
Spark plug cap shorted or not in good con-
tact
Spark plug incorrect heat value
Faulty CDI unit
Crankshaft sensor trouble
Flywheel damaged
Ignition coil trouble
Wiring connector not in good contact
Fuel/air mixture incorrect:
Pilot screw maladjusted
Pilot jet, or air passage clogged
Needle Jet, or air passage clogged
Air cleaner clogged, poorly sealed, or miss-
ing
Choke plunger stuck open
Hot starter plunger stuck open
Fuel level in carburetor float bowl too high
or too low
Fuel tank cap air vent obstructed
Fuel tap clogged
Carburetor holder loose
Air cleaner duct loose
Compression low:
Spark plug loose
Cylinder head not sufficiently tightened
down
No valve clearance
Cylinder, piston worn
Piston ring bad (worn, weak, broken, or
sticking)
Piston ring/groove clearance excessive
Cylinder head gasket damaged
Cylinder head warped
Valve spring broken or weak

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Kx450f 2006Kxf 450

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  • paulo sergio borges Apr 13, 2016 05:03:
    quantidade oleo suspencao kx 450 f