Engine General Information And Diagnosis - Suzuki 2005 GSF1200 Service Manual

Engine General Information and Diagnosis

Engine Symptom Diagnosis
Condition
Engine will not start or is
hard to start
(Compression too low.)
Engine will not start or is
hard to start (Plugs not
sparking.)
Engine will not start or is
hard to start (No fuel
reaching the carburetor.)
Engine stalls often
Engine noisy (Excessive
valve chatter.)
Engine noisy (Noise
seems to come from
piston.)
Engine noisy (Noise
seems to come from
timing chain.)
Engine noisy (Noise
seems to come from
clutch.)
Engine noisy (Noise
seems to come from
crankshaft.)
Diagnostic Information and Procedures
Possible cause
Worn cylinder.
Worn piston ring.
Worn valve guide or improper valve
seating.
Loose spark plug.
Broken, cracked or damaged piston.
Slow cranking starter motor.
Mistimed valves.
Valve clearance out of adjustment.
Damaged spark plug.
Damaged spark plug cap.
Fouled spark plug.
Wet spark plug.
Defective ignition coil.
Open or short in high-tension cord.
Defective CKP sensor.
Defective ignitor.
Clogged fuel tank vent hose.
Clogged or defective fuel valve.
Defective needle valve.
Clogged fuel hose.
Clogged fuel filter.
Fouled spark plug.
Defective CKP sensor.
Defective ignitor.
Clogged fuel hose.
Clogged carburetor jet.
Valve clearance out of adjustment.
Excessive valve clearance.
Weak or broken valve spring.
Worn rocker arm or rocker arm shaft.
Worn or burnt camshaft journal.
Worn piston.
Worn cylinder.
Carbon build-up in combustion chamber. Clean.
Worn piston pin or piston pin bore.
Worn piston ring or ring groove.
Stretched cam chain.
Worn cam chain sprocket.
Improperly working cam chain tensioner. Repair or replace.
Worn countershaft spline.
Worn clutch hub spline.
Worn clutch plate teeth.
Distorted clutch plate.
Worn clutch release bearing.
Weak clutch damper.
Worn or burnt crank pin bearing.
Worn or burnt journal bearing.
Excessive thrust clearance.
Engine General Information and Diagnosis:
Correction / Reference Item
Rebore or replace.
Replace.
Repair or replace.
Tighten.
Replace.
See electrical section.
Adjust.
Adjust.
Replace.
Replace.
Clean or replace.
Clean and dry or replace.
Replace.
Replace.
Replace.
Replace.
Clean or replace.
Clean or replace.
Replace with needle valve seat.
Clean or replace.
Clean or replace.
Clean or replace.
Replace.
Replace.
Clean.
Clean.
Adjust.
Adjust.
Replace.
Replace.
Replace.
Replace.
Rebore or replace.
Replace.
Replace.
Replace cam chain and sprockets.
Replace cam chain and sprockets.
Replace countershaft.
Replace clutch hub.
Replace clutch plate.
Replace.
Replace.
Replace primary driven gear.
Replace.
Replace.
Replace thrust bearing.
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B649G11104011