Patent ID: 7533751

Claim:
A swing arm pivot structure of a motorcycle or a three-wheeled vehicle for tiltably supporting a proximal end portion of a swing arm for pivotally supporting a wheel on a vehicle body frame by way of a pivot shaft, comprising: a proximal portion of the pivot shaft being connected to the swing arm in a state wherein the proximal portion is non-rotatable relative to the swing arm and, at the same time, a distal portion of the pivot shaft is fitted in and held by the vehicle body frame in a state wherein the distal portion is rotatable relative to the vehicle body frame, wherein the vehicle body frame includes right and left portions sandwiching a front end cross member of the swing arm, each of the right and left portions of the vehicle body frame having a corresponding bearing hole, and wherein first and second bearings are respectively interposed between a fitting surface of the distal portion of the pivot shaft and a fitting surface of the corresponding bearing hole formed in each of the right and left portions of the vehicle body frame.