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 Monet Goyon - MC
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Monet Goyon D2-492-71-11
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.

Motorcycle encyclopedia Moto Passion, realised by François-Marie Dumas, include almost 2000 photos presented with an exhaustive history of the motorcycles exhibited.

This unique collection has been realised with the participation of many specialists. With many thanks in particular to Yves Campion, Michael Dregni, Didier Ganneau, Jean Goyard, Helmut Krackowizer, Michel Montange, Christian Rey, Bernard Salvat, Mick Woollett, etc

One can order here

  • Original cards on paper (in french)
  • High resolution scans or original documents presented and signed with my name.

Please contact me at for conditions and copyright.

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François-Marie Dumas

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