1A-10 Engine General Information and Diagnosis:
Noisy engine (Noise
seems to come from
piston)
Worn down piston or cylinder. Replace.
Combustion chamber fouled with
carbon.
Clean.
Worn piston pin or piston pin bore. Replace.
Worn piston ring or ring groove. Replace.
Noisy engine (Noise
seems to come from cam
chain)
Stretched cam chain. Replace.
Worn sprocket. Replace.
Cam chain tension adjuster not working. Repair or replace.
Noisy engine (Noise
seems to come from
clutch)
Worn splines of countershaft or hub. Replace.
Worn teeth of clutch plate. Replace.
Distorted clutch plate. Replace.
Worn clutch release bearing. Replace.
Weakened clutch damper. Replace the primary driven gear.
Worn clutch lifter related parts. Replace related parts as a set.
Noisy engine (Noise
seems to come from
crankshaft)
Rattling bearing due to wear. Replace.
Worn or burnt big-end bearing. Replace.
Worn or burnt journal bearing. Replace.
Too large thrust clearance. Replace thrust bearing.
Noisy engine (Noise
seems to come from
balancer)
Worn and burnt journal bearings. Replace.
Noisy engine (Noise
seems to come from
transmission)
Worn or rubbing gear. Replace.
Worn spline. Replace.
Worn or rubbing primary gear. Replace.
Worn bearing. Replace.
Noisy engine (Noise
seems to come from
water pump)
Too much play on pump shaft bearing. Replace.
Worn or damaged impeller shaft. Replace.
Worn or damaged mechanical seal. Replace.
Contact between pump case and
impeller.
Replace.
Engine runs poorly in
high speed range
(Defective engine internal/
electrical parts)
Weakened valve spring. Replace.
Worn camshaft. Replace.
Valve timing out of adjustment. Adjust.
Too narrow spark plug gap. Adjust.
Ignition not advanced sufficiently due to
poorly. working timing advance circuit.
Replace ECM.
Defective ignition coil. Replace.
Defective CKP sensor. Replace.
Defective ECM. Replace.
Clogged air cleaner element. Clean.
Clogged fuel hose, resulting in
inadequate fuel. supply to injector.
Clean and prime.
Defective fuel pump. Replace.
Defective TP sensor. Replace.
Defective STP sensor or STVA. Replace.
Engine runs poorly in
high speed range
(Defective air flow
system)
Clogged air cleaner element. Clean or replace.
Defective throttle valve. Adjust or replace.
Defective secondary throttle valve. Adjust or replace.
Sucking air from throttle body joint. Repair or replace.
Defective ECM. Replace.
Imbalancing throttle valve
synch
r
onization.
Adjust.
Defective STP sensor or STVA. Replace.
Condition Possible cause Correction / Reference Item
Manuals by Motomatrix / The Solution For Lost Motorcycle Coded Keys
email: info@motomatrix.co.uk / www.motomatrix.co.uk
To Next Page
Loading...
Need help?
General
