Re: Why hello there! (Acton, MA)
Actually I believe that over 49cc it must be reg as a motorcycle. The up to 49cc the only way you can ride it on the street is as a moped. Limited to 20/25 mph. automatic transmission and DOT certified helmet. There are more accurate requirements on this board under laws and legislation section.
It cost $40 for two years. I only got the moped sticker and helmet to avoid any hassle.
PS: Even with the 32t sprocket I seem to have a lot of top end left in the engine. It still climbs hills well so I can't wait for my five speed components to arrive. Hope it's not snowing by then LOL