I called the Dept. of Public Safety in Alabama. After bulding my bike I wanted to be legal. Talked to a State Trooper. Motorized bicycles are considered to be motor driven cycles which have to be registered in Alabama, to be street legal. You well have to get your bike inspected by a State Trooper for safety, then try to get it titled just like a motorcycle for a tag, and then get insurance for it. Not really worth the hassle.