I put a SE 1 air cleaner kit on my 04 1200 today. It already had SE II slip-ons and ran fine. I put a 185 main jet and 45 pilot jet in, and it runs fine except for when I'm rolling down the road, normal speed. When I crack the throttle to pass or accelerate, it stumbles, and kind of bogs, but once you start getting up in the higher rpms it runs fine. I have a 180 main jet, should I try it? I also haven't played with the mixture screw, will that help?