Suzuki sportbikes are the Japanese marque's signature models. The large-displacement Hayabusa defined the hypersportbike class. Meanwhile, the GSX-R1000 superbike and GSX-R600 supersport are Suzuki's road-racing platforms - the Gixxers enjoying great success, including utter domination of the AMA Superbike series with Mat Mladin and Ben Spies. The Gixxer lineup is supplemented by the middle-weight GSX-R750, the only 750 four-cylinder superbike still in production. The GSX650F represents Suzuki's entry-level sportbike. History of Suzuki Motorcycles