Available as a red-and-black scooter, the 2009 Hyosung Rally is partly named after its 49-cubic centimeter (cc) engine displacement. (It is rounded up to 50 cc, thus the ""SF50"" suffix.) The engine on each 2009 Rally is a two-stroke air-cooled single-cylinder that generates 3.5 horsepower at 7,000 revolutions per minute (RPM) and 2.8 lb-ft of torque at 6,500 RPM. It has a reed intake valve configuration, a bore and stroke of 1.61 x 1.47 inches (41 x 37.4 millimeters) and compression ratio of 7.2 to 1. A 14-inch Mikuni carburetor fuels the engine, which is ignited using the scooter’s electric starter.