Motorcycle

Claim 1

In a two-wheeled vehicle having a front wheel, a rear wheel and an engine, the improvements comprising: frame means comprising a forward frame section, an intermediate frame section and a rear frame section, all of said frame sections providing a rigid integral frame for said vehicle and characterized in that the top of said intermediate frame section lies substantially below the tops of said other frame sections; means mounting said front wheel to said forward frame section; means mounting said engine to said forward frame section; foot rest means mounted for supporting the feet of a rider in a forward position relative to the knee of the rider and adjacent the forward frame section to define a link angle at the knee of approximately 110° or greater; means for mounting said rear wheel to said rear frame section; rider seat means having a seat portion and a backrest portion, said seat portion being mounted directly above said intermediate frame section, and said backrest portion extending upwardly and rearwardly for supporting the lumbar region of a rider at an angle substantially in the range of 15°-30° relative to the vertical; a passenger seat mounted to said rear frame section above the elevation of said seat portion of said rider seat means; and an upper support module slidably supported on the upper portion of said rear frame section and adapted for movement between a forward position in which said module covers said passenger seat and the forward portion of said module supports the thoracic region of the rider, and a rear position in which said passenger seat is exposed and a passenger may be accomodated between the thoracic region of the rider and the front end of the module such that the abdominal area of the passenger supports the thoracic region of the rider and the forward portion of said module supports the lumbar region of the passenger seated on said passenger seat.