I live in San Diego I was working at a house old man let me have his kids xr50 with no vin or papers he said his son left it when he moved out.. I got bike for free and put 100$ into it and now running like a champ but wondering how I can register it with bike not having and vin only has engine # it´s AEO3E 5051322 but that´s only numbers on hole bike.. I got bike for my son but scared to go ride and have cop take away.. Wut are my options can anyone HELP