The series two of the “Sport Special” was introduced in early 1971. The model kept the bikes mechanics unchanged, but benefited from the new open-stem Marzocchi fork and the single-colour metallic blue, red, green, grey and bronze paint-jobs. The bike was equipped with higher semi handlebars as standard and an adjustable stance which allowed the driver to use more of a touring driving position. The production of MotoBi branded models was rather limited, and so they are more sought after by collectors. The frame used a single upper spine in pressed steel, making the bike streamlined and compact. On the technical side, it featured a horizontal four-stroke single-cylinder engine, putting out 12.5 hp at 8,500 rpm, cylinder and head in light alloy, and overhead valves at 60° to each other.