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 Monet Goyon - 350 MC
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Photo ou archives : F-M. Dumas

Capacity : 350
Model : MC
Production : 1926 -
Category : (R) Street Bike


350 MC - 1926

First step in four-strokes

After beginning in 1917 with fairly unorthodox three-wheelers, the firm created by Joseph Monet (the brains), Andre Goyon Sr. (the financier) and Andre Goyon Jr. (the technician) turned, in 1923, to more conventional motorcycles powered by English Villiers 147, 175, 250 and 350cc two-stroke engines. But the two-stroke was far from being top dog in the 1920s, despite the brilliant results achieved by the 175cc Villiers, which was capable of over 60 mph.

Engines from Switzerland

In 1926, the Macon-based firm offered two 350cc bikes with four-stroke engines. As with the Villiers, these power units were imported; in this case, Swiss MAG engines made by Motosacoche in Geneva, well-built and bearing an excellent reputation.

Striking Design

The engine fitted to the MC "Super Touring" was the 1C14C F-head (overhead intake, side exhaust), while the second engine was the closely related overhead-valve MAG 1C14G, which powered the MCS "Super Sport." Both had British-made Burman gearboxes. The cycle part was conventional, apart from an odd patented double front downtube – this frame could also take the 250 and 350cc Villiers. More complex and taking longer to make than the cycle part of earlier bikes, the frame of the MC and MCS owed its origin to a welders' strike. Working at premium rates, the welders demanded an increase in their basic pay, which was refused by the management, and a frame that needed no welding was developed.


Engine: 346cc (72x85mm) air-cooled single-cylinder four-stroke; automatic lubrication by Best & Lloyd pump; magneto ignition

Power Rating: 8 hp @ 4000 rpm

Valves: F-head (side exhaust, overhead intake)

Fuel System: carburetor

Transmission: Burman 3-speed, chain final drive

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

Brakes: drum (front)

Wheels: 650x65mm clincher (front & rear)

Weight: 210 lb

Maximum Speed: 53 mph

This fine French classic bad a Swiss engine and an English gearbox in a frame designed to break a French welders' strike.

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.