So I've been playing with my jetting, needle clip position in particular. I finally got it to where my bike ('02 WR426) has never run better... almost. At idle, it will rev high and then low and then stall. I now have to use the hot start button more than ever to get it started. I think think is a pilot air screw issue. How do I know how many turns is enough/too much??? On an interesting note, I also put a new Hi Flow header on. After running it for a while, the header changed color from it's nice new aluminum shade to a almost reddish hue. Could this be a clue as to were to direct my attention???