Abstract: A two or more wheeled vehicle is driven by a DC electric motor having its output shaft connected to a frictional drive member which bears on the circumference of a driven wheel. The drive motor is face or flange mounted on mounting bracket which is constructed of a metal stamping or an integral combination of two stampings. The mounting bracket may take any one of several forms, depending upon whether or not it is desired to hold the power source in addition to the drive motor. In one form, the mounting bracket is adapted to hold a source of power for the motor such as a storage battery. The drive mechanism is adapted to permit the vehicle to be either motor driven or human driven or both in combination. The mounting of the drive mechanism requires no modifications to the vehicle frame and uses the caliper brake bolt as a precise locator to insure universal adaptability of the drive mechanism to any vehicle having such a caliper brake bolt.