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 Shovelhead engine from the enclosed chain, along with a 5-speed transmission and rubber motor mounts to help reduce vibration. In 1981, Harley Davidson purchased AMF's share of the company back, adding a new oil pump, improved valve guides, and lowering the compression to help the engines run on the lower quality gasoline in the United States. The engine was produced until 1984, where the Evolution engine, which had aluminum heads and barrels, began to take over on most models. The engine could still be found in certain models such as the FLH in 1985, but was shortly replaced by the succeeding Evolution