Maryland Transportation Section 11-136

      (a)      "Motorcycle" means a motor vehicle that:

            (1)      Has one front wheel and one or two rear wheels on a single axle; however, if it is equipped with two rear wheels on a single axle, the rear tread width may not exceed 25 inches;

            (2)      Is self-propelled by a motor with a rating of more than 1.5 brake horsepower and a capacity of at least 49 cubic centimeters piston displacement;

            (3)      Has a singular front steering road wheel mounted in a fork assembly that passes through a frame steering bearing and to which is attached a handlebar or other directly operated steering device;

            (4)      Has a seat that is straddled by the driver; and

            (5)      Except for a windshield or windscreen, does not have any enclosure or provision for an enclosure for the driver or any passenger.

      (b)      A detachable sidecar is an accessory to and not a part of a motorcycle.