You can't really guarantee that one, mine was doing that right after i replaced my reeds with the power reeds, and i didn't know what was going on, cause i knew i didn't have an air leak, turns out the trottle cable was just twisted up some how and it was pulling the slide open a little, so when you'd turn it on, it'd rev way up, the idle screw wouldn't work, you'd hit the gas and it would barely do anything, it was just my throttle cable. So check that. put it all on, then take off the airbox boot, and look down the carb and see how your throttle is adjusted