| 摘要 |
A motorcycle frame structure includes pivot plates at rear portions of left and right main frames extending rearwardly and downwardly from a head pipe. A seat rail is fastened to an upper portion of the pivot plate at two positions which are vertically spaced apart from each other, and also at the front end of the seat rail. A first attachment portion and a second attachment portion are attached to a front end of the seat rail. The first attachment portion is fastened to the pivot plate from the horizontally external side of the seat rail with a first bolt, and laterally overlaps a rear upper lateral surface of the pivot plate. The second attachment portion is fastened to the pivot plate from the rear side of the pivot plate with a second bolt, and overlaps a rear portion of the pivot plate.
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