Patent ID: 7845451

Claim:
A motorcycle frame structure, comprising: a head pipe pivotally supporting a front fork and a steering handlebar operatively attached to the front fork; a pair of left and right main frame sections extending rearwardly and downwardly from the head pipe; a pair of left and right pivot plates provided at respective rear portions of the main frame sections and configured to reciprocally swingably support a front portion of a swing arm therebetween, said swing arm rotatably supporting a rear wheel at a rear portion thereof; and a seat rail fastened at a front end of an upper portion of the pivot plates in two positions, the two positions being vertically spaced apart from each other, wherein a first attachment portion laterally overlapping a rear upper lateral surface of the pivot plates and a second attachment portion disposed below the first attachment portion to overlap a rear surface of a rear portion of the pivot plates from the rear are attached to the front end of the seat rail, and the first attachment portion is fastened to the pivot plates from the horizontally external side of the seat rail with a first bolt, and the second attachment portion is fastened to the pivot plates from the rear side of the pivot plates with a second bolt.