XL were motorcycles produced from 1921 to 1924. The first machines produced had 499cc Blackburne or 490cc JAP sv engines. They went into frames with a duplex tubular sub-frame running in a straight line from the front downtube to the rear spindle, so that the engine itself was surrounded. The frame lugs were of pressed steel and this material was also used in the construction of the front forks, rear stand and carrier. It had all-chain drive and a three-speed Sturmey-Archer gearbox, which were well shielded. It also had extensive mudguards, which made it good for touring.
Later, a lager 597cc sv JAP single or a 496cc sv V-twin of the same make could be specified.