Patent ID: 7644795

Claim:
A vehicle body structure of a motorcycle comprising: a vehicle body frame; a swing arm for a rear wheel supported to the vehicle body frame so as to freely swing in a vertical direction; and a rear suspension interposed between the vehicle body frame and the swing arm for the rear wheel; wherein the vehicle body frame is provided with a front frame body constituting a front side of the vehicle body frame, and having a head pipe, and a pair of right and left main frame members extending to a rear side from the head pipe, and a rear frame body constituting a rear side of the vehicle body frame, and having a pair of right and left rear frame members extending to a rear side from rear end portions of the main frame members, the rear suspension is arranged so as to be eccentric to any one of right and left directions of the vehicle body from a center of the vehicle width, and extends to a rear side from a portion near a rear end of the main frame member so as to be coupled to the swing arm, and the rear frame body has a layout space for the rear suspension in a lower side of any one of the right and left rear frame members; wherein the rear frame body has a pair of right and left rear assist frame members arranged in the lower side of the rear frame member, extending to the front side from a rear portion of the rear frame member, and having a front end portion coupled to the front frame body, one of the right and left rear assist frame members has a displacement portion arranged closer to the center of the vehicle width than the other of the right and left rear assist frame members, and the layout space for the rear suspension is formed in an outer side in a lateral direction of the displacement portion.