My 2001 wr426 exhaust is running so hot it is melting a hole in the airbox and the headers are glowing red. I tried re-jetting with a 195 main, 50 pilot, and adjusting my needle jet on the 5th notch. What could be the problem? I heard the Wr's run really hot, but to melt my plastic it must be a problem. What can I do to fix this? Thank you so much for any help.