A jet kit may hellp you get back the snappy throttle response you want, and unfortunately, a pipe will definately help but louder noise comes with that. I have a 650 Rincon with 27 inch ITP's with a lift. I found that I lost alot of power and snap in the throttle. If you dont have these mods, a pipe and jet kit would do wonders for you. You would have what you need. I found that not only did I gain what I had lost..but I now have more than I had stock. That bike would rock with these without mods. I say GO FOR IT !!!!!!!!!!!!!!!!!!!!