Beschreibung:

Introduced in 1909, Harley-Davidson's first v-twin incorporated the innovation of mechanically operated inlet valves in place of the single-cylinder model's 'atmospheric' type. Known by the sobriquet 'pocket valve', this engine - built in 61ci and (later) 74ci displacements - would remain in production for the next 20 years. The single's belt-drive transmission was continued at first on the twin, but the need to make better use of the engine's power characteristics, particularly for sidecar pulling, prompted the introduction of a two-speed rear hub for 1914, by which time chain drive and a proper clutch had been adopted. Later that same year a conventional three-speed sliding-gear transmission was introduced on the top-of-the-range twin, which now was listed as the Model J. The following year a magneto-equipped version of the three-speed twin, the Model F, joined the range and these basic model distinctions - 'J' for generator-electrics machines, 'F' for those with magneto ignition - would continue after the introduction of the 74ci twin in 1922. This Harley-Davidson is one of the first machines acquired for the Pamplona Collection and was sold by Bonhams at the Collection's sale at the RAF Museum, Hendon in February 2010 (Lot 46). It had been purchased in Barcelona in a dismantled state prior to being restored for the Collection. The engine turns over but there is little compression, and it should be noted that the number has been re-stamped. There are no documents with this Lot.