General consensus is that the air injection (AI) and lean low idle mix is the primary cause of the pipes to blue. Adjusting the screws will help, but the AI has to go! Some shops won't take it off, but it's easy enough to do yourself and has no effect on the warranty (unless you drop something down the injector hole and try to crank it up). First TORs were said to be able to go on without any jet changes.. who knows. I think an easier quick tinker is to take off the seat and yank off the snorkle. You'll hear the intake wonk like a 2-stroke, but it seemed to me that that one move made the most noticeable difference at the throttle. If you don't like it you can always just stuff it back in, 2-minute off and on.
