This is one of those weird little bits that we consistently sell but never bother to tell anyone about or promote. If you are like me you've got more than one bike/project and it can be a pain keeping track of the registration for each one all the time. A simple way is just roll it up, stuff it in this stash tube and forget about it. It's wise to put a little Loc-Tite or a dab of RTV on the wingnuts so they don't come loose.
The brackets are spaced to fit most existing US license plates, but you can also mount it just about anywhere. On my old Triumph I used the existing front tank mounts. I narrowed the plexi tube slightly and it worked out great. So, maybe these are not as sexy as a pair of new, lane-splitter certified handlebars or sparkly new lid, but probably way more practical, and only $29.