I wouldn't do it if I were you. I recently purchased my first R1 at the beginning of December. The one thing that the previous owner did to it was that he gutted the entire exhaust cans. It is extremely loud when you ride it, and it does sound raspy. One thing also is that it does pop a lot like it wants to backfire when you let off the throttle. Very noisy, I don't recommend it at all. I am waiting for my AR Baffle Kit to arrive so that I can repack the exhaust.