In addition to my previous post (Yosh slip on), I also had the dealer install a stage 1 jet kit from Dynojet. I hesitated on buying it given the amount of negative feedback I've read from other people, but decided to go for it since I was paying the dealer to install it and could bring the bike back if I had problems. It was a short ride home from the dealer (about 10 miles), so this isn't exactly a thorough review. I can say that I didn't notice any problems whatsoever. Idled fine, accelerated smoothly, constant rpm on the highway with no glitches, etc. When the warmer weather gets here, I will follow-up with more.