so i know ironheads are noisy motors, ive had lots of them, but the one im dealing with right now has got a peculiar knocking clatter, kind of sounds like valve clatter on a chevy 350. what makes it peculiar is that it doesent happen when the bike is parked running, reving, or when riding on acceleration. its only on the very last couple of seconds of deceleration right before you come to a stop that it happens. im guessing that the valve springs are wore out because its also causing wear marks on the top of the pushrods. only thing that makes me think different is its peculiar nature. makes me think its in the driveline somewhere, which i have gone throu, and cant see anything wrong other than maybe a wore out clutch bearing. i have put in different rods, adjusted several times, same thing. tried to use a stethoscope but cant verywell do it while im riding it, and its only got one seat. has anybody else ever experienced this?