Rear wheel supporting system for motorcycle

A rear wheel supporting system for a motorcycle, including a frame, comprising:

• a rear fork having a front end portion connected vertically pivotably to said frame and at least right and left members extending rearwards from said front end portion;
• a rear axle having end portions respectively supported by the rear end portions of said right and left members of said rear fork;
• a rear wheel driving means for driving a rear wheel which is mounted rotatably on said rear axle, said rear wheel driving means being mounted on said rear axle on one side of rear wheel;
• and
• a rear wheel damping means disposed between said rear fork and said rear axle, wherein:
• a first end portion of said rear axle on the side of said rear wheel driving means is supported fixedly by one of said right and left members of said rear fork, and
• a second end portion of said rear axle on the opposite side to said first end portion is supported by the other member of said rear fork resiliently movably in the longitudinal direction of the motorcycle frame through a resilient support means;
• said resilient support means comprising:
• a collar fitted on said second end portion of said rear axle;
• an axle holder connected to said rear fork, said axle holder having a recessed portion so formed as to permit movements of said collar only in the longitudinal direction of the motorcycle frame, said recessed portion having upper and lower inner faces extending substantially in parallel with each other in the longitudinal direction of said frame, said collar being disposed within said recessed portion;
• and
• resilient means including at least one leaf spring disposed in a compressed state respectively between a front face of said concave portion and a front face of said collar and between a rear face of said recessed portion and a rear face of said collar.