I have noticed that my newly acquired 3W bogs when it's flying. The throttle response is slow and unresponsive. I know its not the throttle cable binding because the engine works fine on the ground. I don't have a fuel pump installed and I am running 40:1 fuel mixture. Any recommends on how I can improve engine performance without taking too much of a toll on the engine itself? Anyone have any good procedures on how to tune a gasoline engine? I'm new to the gasoline world.