Engine Noise - KYMCO DINK 125 Service Manual

1. GENERAL INFORMATION

ENGINE NOISE

1-39
Symptom
Valve noise
Piston noise
Cam chain noise
Crankshaft noise
Gear noise
Probable Cause
Valve clearance too large
Worn camshaft lobe
Worn piston rings
Worn piston pin and connecting rod small end
Excessive carbon build-up in combustion
chamber
Damaged cam chain tensioner
Worn cam gear teeth
Worn or damaged cam chain
Extended cam chain
Faulty crankshaft bearing
Worn crank pin bearing
Worn or damaged final reduction gears
Worn final reduction gear shaft splines
DINK50/125