I have a 2002 Polaris Trail Boss 250…did a rering job on it and got compression at 150 lbs..Cranks right up..Idles great..Try to open the throttle up and it acts as if its running out of gas…Took the breather off and its blowing back through the carb at 1/2 to WOT…Blowing the gas back out instead of drawing it into the cyl…What could be causing this????