04 450, stage two hotcams, zip ty fuel screw, gytr weighted flywheel, procom rev box... recently jetted to 170 main with blue slide (everything else stock) (sea level and its getting colder) but it was doing this before rejetting. OK, runs great, pulls in ever gear just the way it should, then maybe 20 mins into riding it suddenly cuts out and won't do anything but idle.. shut it off and start it back up it runs great for another 10 mins.. got to the point now where I just pull in the clutch hit the kill switch and then pop it back up and it runs great for a bit. Sometimes it will go only 300 ft, other times it will go for 15 mins. First I thought I was sucking dirt or something into the main jet so I cleaned the carb (jets were clean), some sediment in float bowl but nothing too bad, then I thought maybe the neutral safety switch wire so that got checked, its ok. Thinking its electrical, maybe the procom box?? any help would be great its hard to track down since it only does it sometimes and then as soon as you shut it off it runs great again.