Poor Running or No Power at High Speed Firing incorrect

Spark plug dirty, broken, or maladjusted Spark plug cap or high tension wiring trouble

Spark plug cap shorted or not in good contact

Spark plug incorrect Camshaft position trouble IC igniter in ECU trouble Crankshaft sensor trouble Ignition coil trouble Fuel/air mixture incorrect: Air cleaner clogged, poorly sealed, or missing

Air cleaner O-ring damaged Air cleaner duct loose Water or foreign matter in fuel Throttle body assy holder loose Fuel to injector insufficient (DFI) Fuel tank air vent obstructed Fuel line clogged Fuel pump trouble

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, worn, or carbon accumulation on the seating surface)

Knocking:

Carbon built up in combustion chamber Fuel poor quality or incorrect Spark plug incorrect IC igniter in ECU trouble Crankshaft sensor trouble

Miscellaneous: Throttle valve won't fully open Brake dragging Clutch slipping Engine overheating Engine oil level too high Engine oil viscosity too high Drive train trouble Air suction valve trouble Air switching valve trouble Catalytic converter melt down due to muffler overheating (KLEEN)

Overheating: Firing incorrect:

Spark plug dirty, broken, or maladjusted Spark plug incorrect IC igniter in ECU trouble Muffler overheating: For KLEEN, do not run the engine even if with only one cylinder misfiring or poor running (Request the nearest service facility to correct it) For KLEEN, do not push-start with a dead battery (Connect another full-charged battery with jumper cables, and start the engine using the electric starter) For KLEEN, do not start the engine under misfire due to spark plug fouling or poor connection of the stick coil For KLEEN, do not coast the motorcycle with the ignition switch off (Turn the ignition switch ON and run the engine) IC igniter in ECU trouble Fuel/air mixture incorrect: Throttle body assy holder loose Air cleaner duct loose Air cleaner poorly sealed, or missing

Air cleaner O-ring damaged Air cleaner clogged Compression high:

Carbon built up in combustion chamber Engine load faulty: Clutch slipping Engine oil level too high Engine oil viscosity too high Drive train trouble Brake dragging Lubrication inadequate: Engine oil level too low Engine oil poor quality or incorrect Gauge incorrect: Water temperature gauge broken Water temperature sensor broken Coolant incorrect:

Coolant level too low Coolant deteriorated Wrong coolant mixed ratio

Cooling system component incorrect:

Radiator fin damaged Radiator clogged Thermostat trouble Radiator cap trouble ECU trouble

Radiator fan relay trouble Fan motor broken Fan blade damaged Water pump not turning Water pump impeller damaged

Over Cooling: Cooling system component incorrect:

ECU trouble

Radiator fan relay trouble Thermostat trouble

DIY Battery Repair

DIY Battery Repair

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