I've got a problem with the needle valve, the thumb screw is broken off flush with the valve tube. That is the reason I was considering putting a carb on it. If you are right John, I will give RJL a call and see if I can get a replacement.
Yes Jim, It is a "Hot" engine! My friend started it once and it scared the #@$* out of him! The needle valve is broken off at just the right point for it to run slightly on the rich side.