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 Monet Goyon - GA
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Monet Goyon D2-492-28-19
Photo ou archives : F-M. Dumas

Capacity : 350
Model : GA
Production : 1932 - 1933
Category : (R) Street Bike


350 GA -1933

Swiss power and reliability

Monet-Goyon built it’s first motorcycle in 1920 - a 117cc four-stroke with the obsolete feature of an automatic intake valve - but it found few buyers. Then the marque turned to two-strokes, and between 1922 and 1925 built lightweights powered by the excellent British Villiers engines. It was not until 1926 that it returned to four-strokes, using Swiss

MAG engines.

In-House versus Import

Monet-Goyon remained faithful to the MAG until 1931, when it introduced the MG35, with a unit-constructed powertrain, built at Mâcon. A poor, unreliable performer, it forced the company to continue to list the reliable MAG-powered models, which were steadily updated as the years passed: Tank, brakes and gearbox were all revised.

Indestructible Transmission

In 1933, Monet continued its policy of fitting in-house power units by offering the MG 35

with a unit-constructed 250cc engine, though the flagship models were all still MAG powered. The launch of the new L-type engines did not occur until the end of the year. Monet's own gearboxes were notoriously weak, so the indestructible British Sturmey-Archer transmission equipped the powerful overhead-valve MAG-engined 350 and 500. ln this form, the 350 GA and 500 HA were virtually without fault and remained in production for several years more alongside the LS4 and LS5, which were entirely made

in Mâcon.


Engjne: 346cc (72x85mm) M.AG air-cooled

single cylinder four stroke; total-loss lubrication with twin-body Pilgrim pump

Power Rating: 13 hp

Valves: overhead; twin-port hemi-head

Fuel System: Amal carburetor

Transmission: Stunney-Arehcr 3-speed handshift, multidisc dry clutch; chain final drive

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

Brakes: 7.8 inch drum (front & rear)

Wheels: 19 inch quickly detachable wire

(from & rear)

Weight 309 lb

Maximum Speed: 72 mph

This stunningly restored 1933 Monet-Goyon was the last of the company's bikes to be powered by the classic Swiss-built MAG engine.

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.

© Tous droits réservés
François-Marie Dumas

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