I have an 08' Fat bob with 2100mi. on it that has an intermittent tapping noise coming from the primary cover. Sometimes very noticable, others not at all. It started at about 200mi. and has done it since. Told the dealer(not where i bought it) about it at the 1000mi service, and they said/did nothing(The dealer i bought it from is about 100 miles away). The bike seems to run fine aside from the tapping. I thought the primary chain might be hitting the case, but understand it has an automatic tensioner. Any thoughts or suggestions?