This certainly looks a lot better on the rear fender than some other places I've seen it; however, it looks out of place to me. The SERG is pretty darn near perfection by itself. From a design perspective, the bikes are perfectly balanced from front to back, top to bottom. Everything has its place. You need to be very careful when doing anything that could take away from the design. The logo will naturally draw the eye of the viewer toward the fender and license plate. Not a good place to get their attention.
FWIW, if you want to create something useful, look at the tank HD logo. It is elegant, but fragile. The point at the beginning of it easily snags and can bend. License plate trim is another area that could use some work. Engraving a SE eagle with the HD name in a font that is similar to what's on the tank could be sold to many CVO owners.