Well I think I need some bigger Jets as of know I have 270 main and 25 pilot.The 270 are what came with the pipes.Mods include 20cc domes,boost bottle,fmf fatty pipes,i have dual kn pods, but i'm going to put the stock air box in with aftermarket filter because i'm going to be doing desert racing.I live in soutern california and the elevation is about 1200. Your help is greatly appreciated... Thanks