Harley-Davidson is an American motorcycle manufacturer founded in Milwaukee, Wisconsin in 1903. In 1901, 20-year-old William S. Harley drew up plans for a small engine with a displacement of 116cc. Over the next two years, Harley and his childhood friend Arthur Davidson worked on their bike. It was finished in 1903. This prototype machine was functional by September 8, 1904, when it competed in a Milwaukee motorcycle race held at State Fair Park. It was ridden by Edward Hildebrand and placed fourth. This is the first documented appearance of a Harley-Davidson motorcycle in the historical record. In 1906 the company produced about 50 bikes that year. By 1920, Harley-Davidson was the largest motorcycle manufacturer in the world, with 28,189 machines produced, and dealers in 67 countries.