Harley-Davidson Model E (1936 to 1948)

The Harley-Davidson Model E is a series of motorcycles that were introduced in 1936. The Model E consisted mainly of the E, EL, and ES variants, which were known for the introduction of the famed Knucklehead engine. This 1000cc twin engine, which varied in output depending on compression, was paired to a 4 speed transmission. The Harley-Davidson Model E ended production in 1948.