A snow vehicle employing a motorcycle body with a steering ski and supporting assembly replacing the front wheel and an endless belt type driving device replacing the rear wheel. A rear fork pivotally mounted to the rear portion of the motorcycle body and includes an integrally formed arm extending rearwardly from the rear fork to mount a drive wheel and one or more guide wheels which in turn mount an endless track belt. The arm extends rearwardly to either side of the track and inwardly thereof for mounting of the guide wheel or wheels.
