it did that because it was out of gas from the can, it was pretty weird but everything works normally. anyway, i still cant seem to get it to stop popping and sputtering like a gocart when its slowing down, (it pops like 2 times in a minute, so its not BAD), im just wondering because ive set the idle and the timing is it supposed to just be that way because its almost 70 or is something still not right. (another valve adjustment.?)