Service Manual — page 711 of 715
Appendix › Troubleshooting Guide
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APPENDIX 17-39
Troubleshooting Guide
Fuel line clogged Compression low:
Throttle body assy holder loose Spark plug loose
Air cleaner housing holder loose Cylinder head not sufficiently tightened
Compression low: down
Spark plug loose No valve clearance
Cylinder head not sufficiently tightened Cylinder, piston worn
down Piston ring bad (worn, weak, broken, or
No valve clearance sticking)
Cylinder, piston worn Piston ring/groove clearance excessive
Piston ring bad (worn, weak, broken, or Cylinder head gasket damaged
sticking) Cylinder head warped
Piston ring/groove clearance excessive Valve spring broken or weak
Cylinder head gasket damaged Valve not seating properly (valve bent,
Cylinder head warped worn, or carbon accumulation on the
Valve spring broken or weak seating surface.)
Valve not seating properly (valve bent, Knocking:
worn, or carbon accumulation on the Carbon built up in combustion chamber
seating surface) Fuel poor quality or incorrect
Camshaft cam worn Spark plug incorrect
Run-on (dieseling): ECU trouble
Ignition switch trouble Miscellaneous:
Engine stop switch trouble Throttle valve won’t fully open
Fuel injector trouble Brake dragging
Carbon accumulating on valve seating sur- Clutch slipping
face Engine overheating
Engine overheating Engine oil level too high
Other: Engine oil viscosity too high
ECU trouble Drive train trouble
Throttle body assy not synchronizing Camshaft cam worn
Engine oil viscosity too high Air suction valve trouble
Drive train trouble Air switching valve trouble
Brake dragging Catalytic converter melt down due to muffler
Clutch slipping overheating (KLEEN)
Engine overheating
Air suction valve trouble Overheating:
Air switching valve trouble Firing incorrect:
Spark plug dirty, broken, or maladjusted
Poor Running or No Power at High Spark plug incorrect
Speed: ECU trouble
Firing incorrect: Muffler overheating:
Spark plug dirty, broken, or maladjusted For KLEEN, do not run the engine even if
Spark plug incorrect with only one cylinder misfiring or poor
Stick coil shorted or not in good contact running (Request the nearest service fa-
trouble cility to correct it)
Stick coil trouble For KLEEN, do not push-start with a dead
ECU trouble battery (Connect another full-charged
Fuel/air mixture incorrect: battery with jumper cables, and start the
Air cleaner clogged, poorly sealed, or miss- engine using the electric starter)
ing For KLEEN, do not start the engine under
Air cleaner housing holder loose misfire due to spark plug fouling or poor
Water or foreign matter in fuel connection of the stick coil
Throttle body assy holder loose For KLEEN, do not coast the motorcycle
Fuel to injector insufficient with the ignition switch off (Turn the igni-
Fuel tank air vent obstructed tion switch on and run the engine)
Fuel line clogged ECU trouble
Fuel pump trouble Fuel/air mixture incorrect:
Throttle body assy holder loose