Have anyone ran the yellow jacket. I was going ot out it on a acromaster. It has the venturi with it I put it on and ran it on the bench. Seem to run good, but the venturi seems to be big. I have it set with the neddle valve half way in to the venturi. Could move it in to cut down on the air coming thru. The RC carb it a lot smaller, but dont know if this is for idle and transition.