A speed control apparatus for an internal combustion engine including a poppet valve seat and a poppet valve pintle assembly disposed coaxially for variably regulating the flow of air into the engine across the valve seat. The purpose of the handle bar is to provide a safety mechanism for kids to hold on to while sitting in the saddle and riding. The dry ice pellet is loaded into a housing through an opening in a bottom region of the housing. The first output connector is formed in a specification the same as the socket of the OBD. The welded portion includes a pair of fragile parts 11 having low weld strength and formed at the ends of two long sides 10a and 10b of the welded portion which are parallel to each other, respectively, The battery is appropriately prevented from exploding and strength of battery is sufficiently provided against an impact caused by fall or the like. A supplemental pilot, or control, signal generator embodied at a mobile station generates a supplemental pilot, or control, signal that is sent on a newly defined supplemental pilot, or control, channel.