I just bought a prodesign k&n proflow kit with outerwear and a k&n powerlid with outerwear. What a nightmare this turned into. I was running rich before the mods at dynojet 150 155 4th clip so i figured I'd be good now, WRONG. My plug tells me I'm lean and it backfires when decelerating. So i jump up to 160 165, plug is still telling me I'm lean but I dont see how. I'm at 600-800ft with a full yoshi exhaust. Does anyone have any ideas? I have a race tomorrow and dont really want to miss it however this jetting is a nightmare. Thanks.