I thought it may have been caused by worn transmission bearings, so I bought the rebuild kit, a new drive belt (60,001 miles on the bike), all of the special tools ($$$$) to disassemble the transmission, because I'm a do-it-yourself guy. Also bought a hydraulic press to press the bearings out. Pulled the transmission out of the frame and replaced all of the bearings. Didn't notice anything wrong except for a noisy main shaft bearing, and noisy shaft bearings. Took me a few days to reassemble the tranny and stand back proudly looking at my mechanical "skill." Fired the engine up to discover the noise is still there? My jaw dropped. Now the possibly is that the starter pinion gear may be making contact with the ring gear in the chain case, but there wasn't any abnormal wear on the pinion or the ring gear when I took them out? The Harley dealership mechanic and an independent Harley shop mechanic both couldn't figure out what the noise is? Does anybody have any clue as to what this problem is? I forgot to mention that there is a possibility that the copper washer on the end of the starter pinion shaft may be spinning up to speed on the clutch pack because of wear? I'll try that one too.