Possible cure for the vibrating licence plate

[xjwmx]

plate , old plate a bead of silicone around the perimeter bolt together at bottom corners and to bracket, and happy new year. Many XS's, many miles.

That works. Did not need the silicone though personally.

Another problem was the mount itself was shaking too much, from shrunken rubber mounts. Was able to tighten that up using hardware store rubber grommets as rubber washers between original rubber and metal washer.