<span style="font-size: larger;"><span style="font-family: Comic Sans MS;">Ame ... all engines are hard to tune inverted especially when the tank is located above the carb. That causes some problems. For me there is no real issue when you start to tune her properly. So far all my inverted engines never had any real problems and I never once moved my tank. If you can, try to use a plug with an idle bar, it helps. The Fireball brand has an idle bar. Of course mounting it sideways helps a lot for sure.</span></span>