I have a 1998 Banshee. It has fatty pipes with pc2 silencers. K&N filter with no lid. TORS removed. The jetting is 290 mains, needle on 4th clip, 27.5 pilot and 1.5 turns on the airscrew. I am having a problem when she is warm. It will run great up until it starts to get warm the it will start to sputter alot on the low-end. I thought it was rich on the pilot but, when I went to a 25 pilot it will backfire and pop alot on the low-end, went to a 30 pilot and noticed no difference. I was just wondering why it would only do this when the bike gets hot. Is there possibly something I am overlooking or is it a possible electrical problem. I have checked for air leaks with carb cleaner and nothing was found. I am completely confused. Someone please help!