I just replaced my old air filter with a new K&N on my 02' FLSTF. the carb is an S&S. The old filter was pretty dirty, but now with the new K&N, the bike seems to stumble/hicup when accelerating just a little. Seems that there could be a slight hesitation if I really get on it. I don't know much about adjusting these carbs, but willing to dig in. any suggestions? thanks