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 Evolution engine until the introduction of the Twin Cam engine, the last of the line of single cam, overhead valve motors tracing their lineage back to the seminal Knucklehead design penned by founder Bill Harley. It is also the largest aftermarket supported Harley-Davidson design, to date, with clones of the engine being produced by third parties like S&S Cycle and several others. Harley reverted to a single cam design with the Milwaukee-Eight engine, first introduced for touring models in 2016. Harley-Davidson Evolution engine The Evolution engine (popularly known as Evo) is an air-cooled, 45-degree, V-twin engine manufactured from 1984 by Harley-Davidson for