For the purpose of this chapter, the terms used herein are defined as follows:
Includes but is not expressly limited to minibikes, motor scooters, mopeds, swamp buggies and snowmobiles and any other motor-driven vehicle designed primarily for the carrying of a passenger or passengers not capable of being licensed or registered under Title 39 (Motor Vehicles) of the State of New Jersey Statutes, as amended, excepting also from this chapter such vehicles as are expressly exempt from registration under Title 39.