Not sure if this is the right place to ask this question. My ST has around 70M miles on it. I am the second owner. I have put over 10M miles on it trouble free. I recently returned from a 5 day trip and on the way home the bike developed an unusual noise. On further investigation I found the two forward exhaust flanges either very loose or missing the nuts. This rig is run on the interstate at above the posted speed limit but I did not think that could be the cause. I have never owned a water cooled bike before. Is this common or a PO issue? Thanks, sorry if this is the wrong place to ask.