i just got a white bros e-series slip-on(12 discs) and K&N Air Filter and K&N Jet Kit. i am at 0-1000 feet. with the filter and the pipe i am currently running a 134 main jet, mixture screw 2 turns out, and the needle on the 3rd clip position. Occasionly the engine will sputter at different RPM's. am i using the right main jet, needle position, and mixture screw setting? or should i change the setup?