I have a 2002 banshee with FMFs, SSTs, and silencers, K&N with a umi adaptor, with no air box lid, and Im running a 280 main jet, I did nothing to the pilot jets, but the problem is, when your like at 1/4 throtle, and then you hit the gas to WOT (wide open throtle) it bogs, then backfires, is this a sign that the air/fuel mixture is off, or am I running to small of main jets...but otherwise the bike runs fine..