Abstract: A motorcycle is provided with a body height adjustor capable of adjusting the body height of the motorcycle by changing lengths of front suspensions and a rear cushion unit. The body height adjustor includes a first hydraulic jack for the front suspensions, a second hydraulic jack for the rear cushion unit, and a body height adjusting unit to transmit hydraulic fluid pressure in the rear cushion unit to the first and second hydraulic jacks through hydraulic hoses connected to a hose connector. The hose connector comprises a front fork side joint member and a body height adjusting unit side joint member each including a cylinder and a free piston movable in the corresponding cylinder by the pressure of the hydraulic fluid passing through the hydraulic hoses. The body height adjustor has a body height changeover valve comprised of a spool valve and a blow valve connected to the spool valve and operated to be opened by the increase of pressure in the hydraulic jacks and the hydraulic hoses.

Abstract: An off-road vehicle is equipped with an endless articulated steel band drive system including a drive wheel, a plurality of idle wheels and an endless belt extending around the drive wheel and the idle wheel. A back slider plate extends along the inner surface of the endless belt to urge the ground contact surface of the endless belt against the ground. The leading portion of the back plate rises upwardly at an angle of with respect to the ground. One of the idle wheels is rotatably mounted to the rear end of the back plate and the back plate is mounted to the vehicle frame by a leaf spring.