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 in Harley's official literature; the nickname arose from the California chopper culture of the late 1960s. As the design of Harley-Davidson engines has evolved through the years, the distinctive shape of the valve covers has allowed Harley enthusiasts to classify an engine simply by looking at the shape of the cover. The knucklehead engine valve covers have contours resembling knuckles on a person's fist that give the knucklehead its name. 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