Also, it is already registered as a bicycle, how could you register again as a moped or whatever. Can't be both has to be a pedal assisted bicycle. Alot of places give you a sticker and everything. Do not want to make a cops job easier. Would be in your best interest to do it, and be a lot harder for him to give you any kind of ticket. If he did give you a ticket you could say make sure it has my registration number just like a bicycle violator. Judge might just throw it out.