The HYOSUNG GF is a line of sportbikes manufactured by the South Korean company, Hyosung Motors and Machinery Inc. The GF series includes the TE 450S and GT 650R, both of which are powered by liquid-cooled, 90-degree V-twins. The TE 450S is a street-legal dirtbike, while the GT 650R is billed as a track-oriented sportbike. Both models feature a six-speed transmission, inverted forks, and the latest Brembo brakes.