The suggestions to check with your local DMV are good one's. Every state is different. With some states, if you are dealing with an antique, you just need a serial number from and engine case, etc, to register as an antique. Others, if you have a registration or bill of sale, it's no problem, Here in the Garden State that is not the case. Unless you have a bill of sale or an old registration, the bike is considered to be a reconstruction. I spent some time on this since I am in the process of putting together a WL from parts. Basically, without any of the aforementioned documents, I need to list all of the parts and their cost and from there the bike will be titled as a 2013 (or whatever year I finish) reconstruction title. Good luck