I don't have a sport bike but rather a cruiser so I sure don't do any wheelies but I was thinking about it today. I have a lot of friends who ride sport bikes and I know wheelies are very popular among many of them. Some of the guys with liter bikes can do full, almost vertical wheelies for long periods of time. Just search Youtube is you don't know what I am talking about. Anyway, my question is how do these engines keep from getting damaged due to oil starvation. Have the manufacturers addressed this issue in designing the engines?