Thanks guy's, these barrel type carb's are not easy to come by. I have considered a WYK with adjustable low end needle but someone else has tried it wthout any success. This is why I brought up the "inlet needle". The main jet had been enlarged but nothing after that seemed to matter and he could not get the carb. to richen up. Makes sense to me that it just isn't getting enough fuel from the inlet. I will be trying mine (WYJ) with the larger inlet soon. Seems these four strokes do not like butterfly carbs. either.