Monet Goyon MG24
This specific 1931 Monet Goyon MG24 was pulled from a barn near Amboise in the Loire Valley in central France and Imported in May of 2017... Where it is currently being restored...
A short while after starting the restoration and a brief look into the history of Monet Goyon, we were startled by the vast number of models produced each year by Monet Goyon and Koehler-Escoffier. Thought to be a later 1935 Monet Goyon MG35, we soon found this was wrong, but in fact - a 1931 Monet Goyon MG24 with patented Villiers Mark VI/A engine, (a 247cc 2-stroke single).
Built in the same factory as the "Koehler-Escoffier", located in Macon, Mid-France. Monet et Goyon soon had relations with the British engineers, being able to produce "Villiers" powered vehicles. We say "Vehicles" as Monet and Goyon (founded in 1917) were well known for producing tri-cycles and mobility vehicles for the soldiers returning from the war.
Monet Goyon had a short production of the specific MG24 model, only 1 year in fact... (1931-1932). In the one year of production, founders; Joseph Monet and Andre Goyon created two variations, the K model and the L model (L standing for Luxury). With the luxury options available at extra cost: a battery, dynamo and lighting equipment.
From 1926 onwards, 350cc seemed to be the popular engine size used by Koehler-Escoffier and Monet et Goyon. Pumping out 4hp-8hp depending on which engine and gearbox combination chosen, the MG range would boast speeds of up to 90Km/h (55Mp/h), holding 12 Litres in its tank and consuming 5 litres per 100Km...
Right back in 1924, a 172cc prototype stationary engine was built and sold to Monet Goyon in France; it was then used in one of their racing motorcycles that won the French GP of that year. Soon after this, Monet Goyon had a license to produce motorcycles with Villiers engines. As you can see, this particular model has a Villiers Mark VI-A engine partnered with a two-speed gearbox.
The Villiers Mark 6, A and B, shared the same crankcases and crankshaft as each other - the only difference is one is a 247cc single, the other a 343cc single... - produced in 1924/25, it's one of the only Villiers engines to have induction and exhaust out of the same way. These particular engines were primarily produced for stationary applications.
Monet and Goyon then catered their MG24 frame to house the VI-A Villiers engine, creating a full exhaust system to match the look of previous models. Monet Goyon designed an advance/retard ignition system onto the engine, whilst maintaining Villiers original decompressor located at the top of the barrel - If you look closely, you will see that there is no joint between the "Head" and the "Barrel" - simply, a one-piece cast-iron combustion chamber.