[jsumd]

Mine would do this with the stock carb. If i got on the throttle too hard or was getting in the higher speeds it would stutter and almost quit like it suddenly ran out of fuel, which is basically what it was doing since the carb couldn't keep up with it what I was asking from it. I switched to a nibbi and haven't had anymore issues. I highly recommend just doing that instead of tinkering with the crappy stock carb.