By 1973 when the hack began development, young had built and rebuilt his 750 motor bringing it up to a massive 980 cc. Along the way, the motor spent some time in various sizes including 811, 836, and 890 before reaching the nearly liter size. The power development did not stop there but first, the side hack. The sidecar was finished and dubbed the Side Strider Mark II. It was designed to be aerodynamically streamlined to reduce drag, and create downward force to keep it on the road at speed.