My 01 SuperGlide is going in the shop tomorrow. It's got what has been called the typical twin cam rattle or tapping or whatever. The wrench listenend to it today and was having a tough time putting his finger on the exact problem so they want to remove, at the very least, the rocker boxes to get a better idea of whats causing the tapping. The noise gotten louder since I bought the bike a year ago. It only got 2500 miles on it. Any ideas?