When the US flag is flown alone, it needs be at the center on the back of the motorcycle, or to its "marching right." The "marching right" is on the right side of the motorcycle to the rider's perspective when facing forward. If the US Flag is on your bike with another, it should be to its "marching right." All flags flown with the US Flag are the same size and at the same height of the US Flag. While the US Flag is on your bike with several other flags the US flag is placed at the center and highest. Other flags should be arranged in alphabetical order and in decreasing importance - Nations first, states (in order of admittance) and territories second, military third (in order of establishment), and then any others.
Flags Mounted on 2017 Polaris Slingshot SL