Re: If it's got a chain drive, Isn't it a motorcycle?
Motorcycles do use chains, belts and drive shafts. Bicycles use drive shafts and chains.
I don't think the means of transmitting the power to the wheel defines any class of vehicles.
Under 50 cc and max of 20 MPH plus capable of being peddled is required by the Feds. Locals can be more restrictive, but not less.
Welcome to a really fun hobby. My bike is strung up on the bike lift in the the carport for my latest mods. New computer, Honda tank under the seat on the rear rack and finally get rid of the teardrop tank on the upper crossbar. That is almost as much fun as catching bugs in your teeth. )
Easy does it, but do it!