06-14-2013, 02:53 PM
thanks for the update. I now wonder if it's cam chain noise from a premature tensioner failure. Blackbirds are notorious for failing cam chain tensioners. When they go, you can hear the cam chain scraping against the cases. It makes a noticeable racket. After replacing mine for the 2nd time, I just gave up and live with the noise as long as the chain doesn't get too slack and really starts causing problems.
