A little more info Mikey, isnt it a special construction frame with 2 wheels and a Honda 4 stroke?
I'm no expert but 2 wheels, a engine, and a pair of handle bars would be condered a motorcycle
In my opinion your building a "A" body with a 250cc engine on gas. A/G 250cc, oh yeah and pedals
I've seen crazy billet engines that didnt come from a motorcycle but a CnC machine and bottomless pockets.