I was hoping somebody out there could help me. I have a 2007 yz 450f and I just rebuilt my motor. I put a weisco high compression piston and stage 1 hot cams in it. I also put on a full pro circuit ti-4 pipe. I put the jets in that pc recomended, but my plug was as white as a tee shirt. They recomended amoung other things a 165 main jet. I kept trying main jets until I reached a 195 main jet, and raised my needle 2 positions, but still my plug is white as can be. I know I need to get a richer needle but I dont know which one. Please help!!