I searched and could not find very much... I hear a knocking at my starter clutch at idle. .. ( my carb's are synced ) ..funny thing if I play around with the sync and unbalance the carb's the knock goes away. Changing the starter clutch did nothing for the knocking so I tore off the engine cover again and looked ..stator is secure (rick's) no movement there but noticed the gear idler shafts, both have a fair bit of play on them ,, I also noticed small hairline stress cracks on the cover side where the idler shafts mate up...is it normal to have play on the gear idler shafts and could this be the source of my knocking sound when the bike is at idle or when the bike is decelerating ..Thank you in advance!