I have a 01 raptor that was stock and ran GREAT but I wanted more from it so I purchased a used pro-circuit full exhaust with a 2" end cap,a UNI air filter and a Dynajet stage 2 kit (with fuel needles).I followed all instructions to the letter. Now the quad idles rough (adjusted idle mixture screws to no avail)and stalls or almost stalls upon hard braking . Spark plug is correct for quad , new, and looks slightly black in color(not white),but the exhaust head pipes glow dark red at night.andthe inside of the head pipes are white.I am also running aviaton(100+ octaine)fuel.As soon as I installed the exhaust system the quad started acting up. The performance gains are awsome but these problems are getting me upset.Please help me and my ailing Raptor