Abstract: In a saddle seat type motor vehicle for use on uneven ground and including a front final assembly provided between left and right front wheels, the front final assembly provides the left and right front wheels with driving torques differentiated at a predetermined ratio when the wheels rotates at different speeds. When the motor vehicle turns, large driving torque is supplied to inner wheels rotating at low speeds compared with outer wheels rotating at high speeds. This enables the motor vehicle to turn effectively and to reduce steering effort.

Abstract: In a four-wheeled buggy which has a pair of front wheels and a pair of rear wheels and a seat arranged around the middle of the vehicle to enable the rider to operate the vehicle in a sitting posture thereon, a pair of right and left main frames are two-dimensionally bent upwardly at the forward sections thereof and adapted to support at the front ends thereof a front wheel axle so as to prevent a front wheel driving device from hitting ground. The rearward sections of the main frames extend horizontally rearwardly to define a lowermost height from ground and are adapted to support a power unit behind the seat close to the rear wheels so as to obtain mass concentration.