forgive me if this is not the place to post this but im new to comp stuff.my 95 1200 sporter i just bought runs and sounds great other than that in third gear cruising it sounds like metal slapping as it lugs,other gears on up do it also but not quit as bad as third. when idleing and rebbing up the sound isnt there.could this be as simple as a drive chain adjustment or ??? thanks tedsshed