“Motorized bicycle” means any vehicle having either two tandem wheels or one wheel in the front and two wheels in the rear, that may be pedaled, and that is equipped with a helper motor of not more than 50 cubic centimeters piston displacement that produces not more than one brake horsepower, and is capable of propelling the vehicle at a speed of no greater than 20 miles per hour on a level surface. The terms do not include an electric bicycle.
(ORC 4511.01(H))