i have the 2.25 rush slipons doherty machine powerpac and fueler, they are bit loud but the issue i have is that the bike seems to run fast on idle i have been told that the only cure is a visit to the stealer to adjust the fast idle.
I also have the rush 2.0s. I was told that I don't need to do anything to it unless I get an air cleaner as well. I'd like my bike a little louder personally. Thee are just holding me over until I can afford to do everything else to it. I'm thining troublemakers.