Harley-Davidson FL (1941 to 2027)

The Harley-Davidson FL is a long running family of touring motorcycles that first debuted in 1941. A wide variety of motorcycles are considered part of the FL family, which originally began due to the introduction of the 74 cubic inch V-Twin engine in '41. Over the years, names such as Hydra-Glide, Duo-Glide, Electra-Glide, and Tour-Glide have been part of the FL family.