Each state is different, but what i do will the old bikes is to ,get a notarized bill of sale from the person your buying it from, with the info of the bike on it and etc. Take pictures of the bike, take pencil rubbings of the vin # and engine #. An old lic. plate or registration if you got it, as much info as you can. Bring it all down to motor vehicle, and you MAY be OK. This is what I do in Jersey, and I have not had a problem . Give a call to your own state agency, they will tell you. Scooterbob may know better then I, but I believe after a certain amount of time, they don't worry about whether the bike was stolen, maybe after 20 years?