Hello, i just picked up a 2002 yz426f off craigslist a couple days ago. So anyway the bike has a hanging idle, but the idle only hangs once the bike is warmed up, it idles fine when cold. I have check my valve clearances and they are within spec, they are on the tight side of spec, but within spec. All 3 intake valves are .103mm and the exhaust are .223mm and .208mm . I am extremely frustrated trying to find the source of the problem, i have tried spraying carb cleaner all around the carb while its running and it does nothing, so i guess there is no air leaks.. Also, while the idles hanging, if i put it in gear and feather the clutch just a little bit to bring the RPM's down; then it will idle normal, but as soon as i give it any throttle BOOM its hanging again. &%$#@! why is it hanging??? so frustrated with it! I just dont understand why when the bikes still cold it idles fin and if i give it gass it just falls right back down to normal idle, but ass soon as its up to temp it starts hanging.... BTW the header does glow dimly red, can only really see it glowing when its dark out, and its a real dim glow.