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 Sarolea - 600 Monotube 35 C6 side Bufflier
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Sarolea Monotube 35 C6 side Bufflier motocyclette motorrad motorcycle vintage classic classique scooter roller moto scooter
Photo ou archives : F-M. Dumas

Capacity : 600
Model : Monotube 35 C6 side Bufflier
Production : 1935 -
Category : (R) Racing


35 C6 Monotube - 1935

A mount for daring riders

Belgium's oldest marque produced its first motorcycle in 1901 and won the Belgian speed championship in 1902. The firm, from Herstal, near Liège, retained its sporting image right up to the end of production in 1960.

Mutiple Gearboxes

Late in 1923, Saroléa announced its first cataloged ohv 500, which was soon being raced with success. It was followed by many other high-performance models. Then, in 1934, came the 34 C "Monotube," also known as the "Grégoire" since it was a replica of the works racer with which Robert Grégoire had won the 1933 Belgian championship, before being killed during practice for the Belgian GP. Introduced as a 500 with an English Sturmey-Archer gearbox, from 1935 the Monotube was also available in 350 and 600cc form for sidecar racing, and fitted with an original gearbox.

Ahead of Its Time

The astounding competition record of the Monotube cannot be attributed to technical sophistication; this uncomplicated ohv single won repeated victories in the hands of noted riders of the day like Grégoire, Grizzly, Cora, Monneret, and Berthier. These wins were achieved by daring riders who made full use of the outstanding power and torque – and reliability – of the Monotube engine. Nevertheless, the gear-change was imprecise and the frame of the 350 and 500 was notorious for its lack of rigidity. Only that of the 600 was truly satisfactory, for it was joined beneath the crankcase.


Engine: 589cc (88x97.7mm) single cylinder; dry-sump lubrication; magneto ignition

Power Rating: 36 hp @ 5600 rpm

Valves: overhead; hairpin valve springs

Fuel System: carburetor

Transmission: 4-speed foot change

Suspension: girder forks (front); rigid (rear)

Brakes: drum (front & rear)

Wheels: 3.00x21 inch (front); 3.50x19 inch (rear & sidecar)

Maximum Speed: 87 mph with sidecar.

This 600 Saroléa 35 C is the sole known survivor. Designed to original specifications, it is still capable of climbing the Mont Ventoux hill-climb at 50 mph and reaching 87 mph on the level.

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.