Suzuki GSF1250 Service Manual page 77

Condition
Engine stalls often
(Incorrect fuel/air mixture)
Engine stalls often (Fuel
injector improperly
operating)
Engine stalls often
(Control circuit or sensor
improperly operating)
Engine stalls often
(Engine parts improperly
operating)
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
crankshaft)
Engine noisy (Noise
seems to come from
balancer)
Engine noisy (Noise
seems to come from
clutch)
Engine noisy (Noise
seems to come from
transmission)
Possible cause
Defective IAP sensor or circuit.
Clogged fuel filter.
Defective fuel pump.
Defective fuel pressure regulator.
Damaged or cracked vacuum hose.
Defective ECT sensor.
Defective thermostat.
Defective IAT sensors.
Defective ISC valve.
Defective fuel injectors.
No injection signal from ECM.
Open or short circuited wiring
connection.
Defective battery or low battery voltage. Replace or recharge.
Defective ECM.
Defective fuel pressure regulator.
Defective TP sensor.
Defective IAT sensors.
Defective CKP sensor.
Defective ECT sensor.
Defective fuel pump relay.
Defective ISC valve.
ISC bad learning.
Fouled spark plugs.
Defective CKP sensor or ECM.
Clogged fuel hose.
Out of adjustment tappet clearance.
Dirty throttle body.
Too large tappet clearance.
Weakened or broken valve springs.
Worn tappet or cam surface.
Worn and burnt camshaft journal.
Worn down pistons or cylinders.
Combustion chambers fouled with
carbon.
Worn piston pins or piston pin bores.
Worn piston rings or ring grooves.
Stretched chain.
Worn sprockets.
Tension adjuster not working.
Rattling bearings due to wear.
Worn and burnt big-end bearings.
Worn and burnt journal bearings.
Worm bearings.
Rattling bearings due to wear.
Worn splines of countershaft or hub.
Worn teeth of clutch plates.
Distorted clutch plate, driven and drive. Replace.
Worn clutch release bearing.
Weakened clutch dampers.
Worn or rubbing gears.
Worn splines.
Worn or rubbing primary gears.
Worn bearings.
Engine General Information and Diagnosis:
Correction / Reference Item
Repair or replace.
Clean or replace.
Replace.
Replace.
Replace.
Replace.
Replace.
Replace.
Replace.
Replace.
Repair or replace.
Repair or replace.
Replace.
Replace.
Replace.
Replace.
Replace.
Replace.
Replace.
Replace.
Reset learned value.
Clean.
Replace.
Clean.
Adjust.
Clean.
Adjust.
Replace.
Replace.
Replace.
Replace.
Clean.
Replace.
Replace.
Replace.
Replace.
Repair or replace.
Replace.
Replace.
Replace.
Replace thrust bearing.
Replace.
Replace.
Replace.
Replace.
Replace the primary driven gear.
Replace.
Replace.
Replace.
Replace.
1A-8