I live in Connecticut and have spent most of the last 6 months tooling around Long Island, NY. Connecticut does not require motorized bicycle registration; all you need is a valid Driver's License. As for NY, it's been my experience that if you drive your motorized bicycle responsibly and respectfully, cops won't bug you...at least in Suffolk County. I've had at least 3 cops stop to comment on how cool my bike was and to ask where I got it. Wear a helmet, have lights on, and drive under 25MPH on the shoulder...you should be just fine. Cops aren't stupid; if you try defrauding them with bogus VIN #s, you may just get yourself arrested for insulting their intelligence. Same thing applies for those engraved "49cc" magneto cover plates...just don't be a dick on your motorized bicycle...cops are regular guys too, and can appreciate novel mechanical conveyances.