I rode this 4 wheeler all weekend no problem did get some crud in the carb and was having problem with it breaking up when you'd blip the throttle fast. Took the carb apart very apparent that there was crap in it cleaned it up. Put it back on the 4 wheeler now it's acting like it has a vacuum leak! It revs to the moon and the only time it doesn't is when it's starting to run out of fuel in the bowl. So I guess it's drinking too much fuel?! I've messed with the air/fuel screw and the idle screw. As well as taking the entire carb apart again. I'm stumped. It's peeving me off! Ive checked all possible locations for air leaks. I've gone through these carbs plenty but this one is being a twat