Harley and the Davidsons also killed. In addition, Hasha's involvement with the company in the first episode was exaggerated and expanded upon, although he did indeed become friends with co-founder Arthur Davidson when he worked at a Dallas dealership and raced a motorcycle loaned by the company, in contrast to not being able to represent Harley and betraying in favor of Indian as depicted in the miniseries. Arthur Davidson's proposal of 20,000 motorcycles to the United States military for World War I was also fictionalized; Indian provided 41,000 units for the military effort while Harley produced 15,000. While the founders unveiled their 1936 EL
Harley-Davidson Knucklehead engine Harley-Davidson Knucklehead engine The knucklehead is a retronym used by enthusiasts to refer to a Harley-Davidson motorcycle engine, so named because of the distinct shape of the rocker boxes. The engine is a two-cylinder, 45 degree, pushrod actuated overhead valve V-twin engine with two valves per cylinder. It was the third basic type of V-Twin engine used by Harley-Davidson, replacing the Flathead-engined VL model in 1936 as HD's top-of-the-line model. The engine was manufactured until 1947 and was replaced by the Panhead engine in 1948. The Knucklehead-engined models were originally referred to as "OHVs" by enthusiasts of the time and