I just bought a MiniBike with a HS 50 on it. It had a cheap replacement carb on it, and would only start for a few seconds on starting fluid. I took that carb apart and cleaned it but it looked brand new inside. It still was the same after cleaning and only ran a second on starting fluid. I bought a $12 carb and put it on and now it will run on full choke but will stall if I take it off choke or try to rev it up a little. Thanks in advance and any help will be greatly appreciated.