If 'sounds like a dirtbike' means sounds like a single cylinder 4 stroke engine there is nothing you can do about that. the cbr engine is basically a dirtbike motor and there is nothing wrong with that... and a loud bike wont do a thing for safety.
But.. Biohazard cycles are a site sponsor and lots of exhaust discussion in his threads.
But.. Biohazard cycles are a site sponsor and lots of exhaust discussion in his threads.