I've been trying to diagnose a weird condition with an 03' yamaha wr450. Has anyone had this happen or have any clues what to look for with this. My buddy raced the bike in a nasty harescramble and overheated it so bad that the bike just died and would not start after this. He went home with it washed it and began to check it out, he found that the wires coming from the pulse rotor and going to the cdi box had cooked right through the insulation. So he fixed this up pretty good and the bike started. Now the bike will run with the revs up but if ya let it drop to an idle it just dies and wil not start up at all unless you put the choke on and then it will do the same thing again. We checked out tha carb. and the hot start unit but this looks good. Could anyone give me some clues to this???? Thanks in advance.