The SuzukiGS series is a line of motorcycles featuring air-cooled parallel-twin and Inline fourengines with two or four valves per cylinder. The GS-range of models are considered to be examples of Universal Japanese motorcycles. The range of motorcycles in the series had engine displacements between 125 cc and 1100 cc, and include the GS400 and GS500. The GS series also include the original Katana series, although the 1100 had 16 valves, thus being a GSX. It was however still designated as a GS on some markets.