State of Maine:
obtaining a motorcycle license
registering a vehicle
In Maine, you are allowed to register a dual sport motorcycle for street use with a license plate, and also register it as an ATV at your town office for legal access to the ATV trail system. The ATV registration/sticker is $34 for Maine residents. NOTE: there are trails and property owners that allow ATVs, but do not allow motorcycles. Please respect the access rules - the more the property owners get annoyed, the fewer trails we have to ride.
New England Trail Riders Association
(and the Penguin and Fishtail racing schools)
Maine Vintage Motorcycle Group - Facebook
Owls Head Transportation Museum