Rear arm bearing structure for motorcycle

摘要

A motorcycle has a front frame, and a rear arm pivotally mounted to the frame for mounting the rear wheel. The rear wheel is driven by a propeller shaft that has a universal joint intersected by the axis of a bearing structure which mounts the rear arm. The bearing structure which mounts the rear arm lies inboard of the propeller shaft, whereby to enable reduction of the widthwise dimension of the motorcycle, and to enable a lighter-weight assembly of this portion of the motorcycle to be utilized, because it is unnecessary to bifurcate the bearing structure or to place part of it laterally outside of the propeller shaft.