This is license plate mount I made to mount on the swing arm of a Harley Davidson FXR. Each plate mount I make is customized for style, function, and mounting for each bike. Most of the time I am able to do this with measurements and pictures. For the example pictured I used 1/4" steel for the plate that bolts to the swing arm and acts like a gusset and 12 gauge steel for the metal that the plate bolts down to. I used a sheet of brass that is bolted in place and made visible by 3/4" aluminum spacers. Because the plate mount is not near the taillight on this bike I used LED light bolts to illuminate the plate and welded tubes to the back side to run the wires through.