The Harley-Davidson FL is a model designation used on Harley-Davidson motorcycles since 1941. The FL prefix is mostly applied to Harley-Davidson’s large-framed bikes, including the current Touring series, and also the Softail series, especially those with traditional styling, 16-inch front wheels, and either Springer forks or large-diameter telescopic front forks.
The FL model was given a new frame in 1958. This frame included a rear swingarm suspended by a pair of coil-over-shock suspension units. In honor of this fully suspended chassis, the FL’s model name was changed from Hydra-Glide to Duo-Glide.
This excellent Duo-Glide from 1959 presents beautifully in its black and white paintwork and is a matching numbers example.