As used in this chapter, the following term shall have the meaning indicated:
Shall include, but not be expressly limited to, minibikes, motor scooters and any other motor-driven vehicle designed primarily for the carrying of a passenger or passengers not capable of being licensed or registered under N.J.S.A. 39-1 et seq., as amended. Vehicles which are expressly exempt from registration under N.J.S.A. 39-1 et seq. shall also be excepted from regulation under this chapter.