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 Harley Davidson - 1000 8 soupapes
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Capacity : 1000
Model : 8 soupapes
Production : 1916 - 1924
Category : (R) Racing


1000cc 8 Valves - 1922

The last of originality

Even the rare few who are not moved by the Harley legend have to show a flicker of emotion when they come face-to-face with the Milwaukee marque's famed eight"valver.

Harley's Last Great Leap Forward

Some will tell you that this was the last Harley worthy of attention, for it was also the last to make use of advanced technology! Just after WWI, with an annual production running at some 12,000 machines, Harley-Davidson passed Indian as the world's biggest manufacturer, and purists regard this bike as the last upsurge of originality.

Technological Caution

Even then, Harley was not regarded as an innovator. Indian had experimented with a four-valve head in 1911, two years before Europe's first four-valvers came from Peugeot and Alcyon, and Harley's first venture into this field was not made until 1913. The British engineer Harry Ricardo, who had just created the immortal Triumph-Ricardo, assisted with the development of this experimental machine. Harley always preferred to let others do the pioneering for it. This cautious approach has ensured its survival. After the WWI, Indian and Harley four-valve singles and eight-valve twins battled for supremacy on American circuits. However, the technique had not been fully mastered and soon brute force, in the shape of side-valve V-twins, had taken over from the elegant eight-valvers. The multi-valve Indians and Harleys had deserted the racetracks by 1928 and been replaced by less adventurous designs. American bikes had begun the long years of technological caution.


Engine: 989cc (84x89 mm) air-cooled V-twin four-stroke

Power Rating: 45 hp @ 4500 rpm

Valves: four overhead per cylinder

Fuel System: carburetor

Transmission: 3-speed, chain final drive

Suspension: leading link (front); rigid (rear)

Brakes: none

Wheels: 3.00x26 inch wire (front & rear)

Maximum Speed: 112 mph

Harley eight-valvers enjoyed racing success on both sides of the Atlantic; in England "Fiery Fred" Dixon fought notable duels on his Harley with the Indian twins on the Brooklands oval.

Le fichier Moto Passion réalisé par François-Marie Dumas réunit près de deux mille photos accompagnées d'un historique très complet des machines présentées.
Il sera progressivement mis à jour ici et toute information complémentaire est la bienvenue sur info@moto-collection.org.

Cette documentation unique, qui constitue sans doute l'encyclopédie la plus exhaustive jamais écrite sur l'histoire de la moto, a été réalisée avec l'assistance de nombreux spécialistes dont principalement Didier Ganneau, Christophe Gaime, Mick Woollett, Jean Goyard, Bernard Salvat, Christian Rey, Yves Campion, Helmut Krackowizer, Michael Dregni, Michel Montange, etc. que je remercie ici.

Disponible sur demande :
- Les fiches originales sur papier
- Les photos et archives signées de mon nom en haute définition ou les documents originaux.
Me contacter sur info@moto-collection.org pour les conditions et droits d'utilisation.