I took the bike back in to my local shop to see if there were any other leaks and they just scratch their head. They suggested maybe old exahust. My mufflers do have 115,000-120,000 miles on them. They suggested switching them out with another pair and see if it still happens. Not going to do that. I'll wait and see if it gets worse and take it to a better shop I know, but it's 90 min away.