The Yamaha YFA 125 is a motorcycle manufactured by Yamaha Motor Company. It is a single-cylinder, air-cooled, four-stroke motorcycle designed for recreational off-road use. The Yamaha YFA 125 is a lightweight, agile machine that is intended to provide a pleasant, confidence-inspiring ride. It is powered by a 124cc, four-stroke, air-cooled, single-cylinder engine. It features a five-speed manual transmission and a chain final drive. The Yamaha YFA 125 was introduced in 1989 and is still in production.