This bracket was originally created to mount the many variants of the Sport Gearbox but has proved to be a very versatile mounting bracket. Any motor or gearbox with a 2-inch diameter bolt circle can be mounted in this bracket. The center hole is sized to locate the 1.5 inch outside diameter of a Blue Sport gearbox.
Examples of motors with a 2 in. diameter bolt circle:
Examples of gearboxes with a 2 in. diameter bolt circle