When I picked up my bike from the dealer a few weeks ago, I heard a ‘rattle’ from the right side on the way home. I went right back to the dealer, but by then the noise disappeared. They told me when the bike is new; sometimes the baffles in the exhaust expand and make a noise (even thought is seems to be more located by my right leg, not from behind). I have had the bike out only 4 times, and each time I hear the noise, but it generally happens when the bike is warmed up, and speeds between 30 and 40mph. I thought it was the heat shields on the pipes rattling at upper speed vibration. I tightened all the clamps down, and for the most part, the noise has gone. I do still hear it, but not as prevalent. Is this normal, did not notice on my 2000 FXDL, but that was ten years and smaller cc engine ago.