1. GENERAL INFORMATION GRAND DINK 250 ENGINE NOISE Symptom Probable Cause Valve clearance too large Valve noise Worn camshaft lobe Worn piston rings Piston noise Worn piston pin and connecting rod small end Excessive carbon build-up in combustion chamber Damaged cam chain tensioner Cam chain noise Worn cam gear teeth Worn or damaged cam chain Extended cam chain Faulty crankshaft bearing Crankshaft noise Worn crank pin bearing Worn or damaged final reduction gears Gear noise Worn final reduction gear shaft splines 1-21