Suzuki GSX series

The Suzuki GSX series is Suzuki's range of sport touring motorcycles powered by four-valve per cylinder four-stroke engines. The first GSX models were introduced in 1980 and were the next step in Suzuki's four-stroke road bike range after the two-valve GS series. The two-valve engines stayed in production alongside them, with the larger ones gaining shaft drive for touring bikes such as the GS850G and GS1100G, while the GSX series represented performance orientation. Its key feature was the Twin Swirl Combustion Chamber, a four-valve per cylinder design with a flat topped piston that replaced the hemispherical chamber and domed piston of the GS engine. In North America the four-valve and two-valve bikes were both sold as Suzuki GS motorcycles.