Stupid carb prob on yfz (white smoke)

[speedy]

I dont know what went wrong, I had been riding for about 1 hour and the yfz 450 was running great and all of a sudden while going down the street in 5th gear at a low speed the quad just died, i tryed 4 or 5 times to start it and finally it started but it poped and cracked then died again , i pulled the the choke and it would idle with WHITE SMOKE coming out the exaust. So whats the POBLEM?( I recently befor this happend jetted the carb for a new exaust system i put on it):mad: :confused: ;)

[underpowered]

white smoke is water/coolant burning. sounds to me like you may have blown a headgasket.

[d3ktrix]

White smoke normally means you are burning water/coolant.

See if your coolant level is going down, or if ur oil is milky.

EDIT: lol beat me to it.

[speedy]

well i had put some gas out of an old jug in it shortly befor that happend and i also checked the oil and it looked real clear is that normle?

[GPracer2500]

Could be water in your gas. Drain the carb and tank, fill with fresh gas and see if it happens again.