Just to throw my 2 cents in....I put a set of Staintunes on my BA 05 and removed the removable little baffle in the end of it and really like the sound. I do mostly longer runs and after about 4 or 5 hours of the drone I start to go crazy but these pipes are not so loud but loud enough people can here you coming and they are a very deep old style Trumpy throat. If you don't remove the little baffles you do not need to re-jet but I did and factory suggests 135's which I did. I also took the stock 17 tooth sprocket off and replaced with a 19....OMG what a huge difference. No snorkal and 2 1/2" holes drilled through the bottom of the air filter and box. AI removed and have no pharting at all on de-exceleration. The small changes I made, not that I feel that buying a new cycle warrents having to make the changes ( I didn't want to) but in the end it is totally worth while.
