Abstract: The present invention is related to a power driven support mechanism for parked two-wheeled motor vehicles, in which the support member pivots between its upright and retracted position by activation of a support member drive mechanism. In particular, it concerns a support mechanism and its installation configuration, constructed in such a way as to eliminate the above described problems of exposure to the elements, diminished ground clearance, and excessive lateral bulk. By constructing the vehicle in such a manner that the under-chassis support material is caused to extend beyond the chassis in an interior and posterior direction, and furthermore, so that the anterior aspect of the power unit for applying driving force to the drive wheel (conventionally the rear wheel) is mounted on this protruding under-chassis support material, a space is created between the protruding under-chassis support material, the power unit, and the under-chassis.