CLUTCH SLIPPING/ WORST CASE: STARTER CHAIN FROM CRANK TO STARTER CLUTCH CAN SHATTER GUIDE ON UPPER CRANKCASE JAMMING VARIOUS BITS. CAN BE SORTED TURNING REMOVED ENGINE UPSIDE DOWN & REMOVAL BOTTOM C/CASE. EARLY ENGINES HAVE WEAK PART,REPLACEMENT PART ITSELF IS CHEEP BUT PERFECT. 100,000 PLUS MILES SINCE REPAIR BY ME