And now the fun begins. I my area I went through months of negotiations and questions and talking with various "beaurocrazies" and was told basically "you can't register that here". What it all boils down to is accountability. Nobody has any paperwork that lets them register your machine and then gets them off the hook if you kill yourself on it. They would let me register mine if I listed it for off road use up in cottage country or on a farm. Your best bet is to build it for fun and make it as quiet running and smoke free as you can. Don't annoy people riding your creation and most of all don't "p___-off" motorists by getting in their way. BTDT.first check with DMV department of your state. Where I live in new york you can only register a bike with an MCO manufacturer certificate of origin. They do not allow homemade gas bikes.