Harley-Davidson first added sidecars to its model line in 1914, and later offered specially tuned engines for sidecar use. Before then, standard bikes such as this Model J just had a sidecar bolted onto them. Harley’s big F-head V-twin was ideal for pulling a sidecar and the company began offering sidecars as an option in 1914. From then until 1925 Harley’s sidecars were built by the Rogers