I have a fpe 95cc engine in a 35% aeroworks edge. it runs great with plenty of power but when i roll inverted it stutters and doesn't want to run. it has never cut off yet but you can advance the throttle up to half and it runs the same, as soon as you roll it back over it takes right off. i have bought a new carb and installed and i am still having the same problem. any ideas? i need it to run the same in all attitudes. inverted is the only problem.