Monet & Goyon Four-stroke engines.
1 1/2HP
Manufacturer: Monet-Goyon
Capacity : 117cc
Bore/Stroke : 52.5 x 54mm
Power : 1.5 cv @ 1500 rpm/min
Max RPM : 3000 rpm/min
Magneto ignition
Fuel delivery : Carburettor
No gearbox or clutch
MG 25
Manufacturer: Monet-Goyon
Four-stroke Sidevalve
Capacity : 250cc
Bore/Stroke : 63.5 x 78mm
Power : cv @ rpm/min
Ignition : Flywheel magneto
Fuel delivery : Carburettor
3-speed gearbox with clutch
L.
Manufacturer: Monet-Goyon
Four-stroke Sidevalve
Capacity : 247cc
Bore/Stroke : 63.5 x 78mm
Power : 7.5 cv @ 4000 rpm/min
Magneto ignition
Fuel delivery : Carburettor
No gearbox or clutch.
L.3.
Manufacturer: Monet-Goyon
Four-stroke Sidevalve
Capacity : 247cc
Bore/Stroke : 63.5 x 78mm
Power : 7.5 cv @ 4000 rpm/min
Magneto ignition
Fuel delivery : Carburettor
No gearbox or clutch.
A.L.3.
Manufacturer: Monet-Goyon
Four-stroke Sidevalve
Capacity : 247cc
Bore/Stroke : 63.5 x 78mm
Power : 7.5 cv @ 4000 rpm/min
Magneto ignition
Fuel delivery : Carburettor
No gearbox or clutch.
L.S.3
Manufacturer: Monet-Goyon
Four-stroke OHV
Capacity : 247cc
Bore/Stroke : 63.5 x 78mm
Power : 10.5 cv @ 5000 rpm/min
Morel Magneto type G1
Fuel delivery : Carburettor
No gearbox or clutch.
L.S.3.S
Manufacturer: Monet-Goyon
Four-stroke OHV
Capacity : 247cc
Bore/Stroke : 63.5 x 78mm
Power : 10.5 cv @ 5000 rpm/min
Magneto ignition
Fuel delivery : Carburettor
No gearbox or clutch.
A.L.S.3
Manufacturer: Monet-Goyon
Four-stroke OHV
Capacity : 247cc
Bore/Stroke : 63.5 x 78mm
Power : 10.5 cv @ 5000 rpm/min
Max RPM : rpm/min
Magneto ignition
Fuel delivery : Carburettor
No gearbox or clutch.
A.L.S.3.S
Manufacturer: Monet-Goyon
Four-stroke OHV
Capacity : 247cc
Bore/Stroke : 63.5 x 78mm
Power : 10.5 cv @ 5000 rpm/min
Morel Magneto type E1
Fuel delivery : Carburettor
No gearbox or clutch.
MG 35 n°1
Manufacturer: Monet-Goyon
Four-stroke Sidevalve
Capacity : 350cc
Bore/Stroke : 72 x 85mm
Power : 8.5 cv @ 4000 rpm/min
Flywheel magneto
Fuel delivery : Carburettor
3-speed gearbox with clutch
MG 35 n°2
Manufacturer: Monet-Goyon
Four-stroke Sidevalve
Capacity : 350cc
Bore/Stroke : 72 x 85mm
Power : 8.5 cv @ 4000 rpm/min
Ignition : Flywheel magneto
Fuel delivery : Carburettor
3-speed gearbox with clutch
MG 35 n°3
Manufacturer: Monet-Goyon
Four-stroke Sidevalve
Capacity : 350cc
Bore/Stroke : 72 x 85mm
Power : 8.5 cv @ 4000 rpm/min
Magneto ignition
Fuel delivery : Carburettor
3-speed gearbox with clutch
L.5.A.
Manufacturer: Monet-Goyon
Four-stroke Sidevalve
Bore/Stroke : 75 x 110mm
Capacity : 486cc
CR : 6.15
Power : 12 cv @ 3500 rpm/min
Max RPM : 4200 rpm/min
Magneto ignition
Fuel delivery : Carburettor
No gearbox or clutch.1
Fuel economy : 5.5 l / 100km
L.5.A.1
Manufacturer: Monet-Goyon
Four-stroke Sidevalve
Capacity : 486cc
Bore/Stroke : 75 x 110mm
CR : 6.15
Power : 12 cv @ 3500 rpm/min
Max RPM : 4000 rpm/min
Magneto ignition
Fuel delivery : Carburettor
No gearbox or clutch.
Fuel economy : 5.5 l / 100km
Motorox M 21
Manufacturer: Monet-Goyon
34cc two-stroke
Bore/Stroke : 35 x 35mm
Power : 0.6 cv @ 5500 rpm/min
Flywheel magneto
Fuel delivery : Carburettor
No gearbox or clutch.
Fuel economy : 1.2 l / 100km
From 1934, Villiers engines were built under license in the Mâcon factory.
MG Villiers engines include:
T 41
Bore/Stroke : 50 x 50 mm
Capacity : 98 cc
Power : 2 cv @ 3500 rpm/min
Flywheel magneto
Single speed (no gearbox)
Based on the Villiers Junior Mk IIF
T 41 G
Bore/Stroke : 50 x 50mm
Capacity : 98cc
CR : 7.85
Power : 3.2 cv @ 3800 rpm/min
Max RPM : 4500 rpm/min
Ignition : Flywheel magneto
S2G
Bore/Stroke : 47 x 57mm
Capacity : 98cc
CR : 7.2
Power : 2.9 cv @ 4400 rpm/min
Max RPM : rpm/min
Ignition : Flywheel magneto
10D - T43
Bore/Stroke : 50 x 62mm
Capacity : 121.6cc
CR : 6.5
Power : 5 cv @ 4800 rpm/min
Max RPM : rpm/min
Ignition : Flywheel magneto
Fuel : Gurtner M20D
Clutch : yes
Gears : 3
10D4 - T43
Bore/Stroke : 50 x 62mm
Capacity : 121.6cc
CR : 6.5
Power : 5 cv @ 4800 rpm/min
Max RPM : rpm/min
Ignition : Flywheel magneto
Fuel : Gurtner M20D
4-speed gearbox with clutch
M18
Bore/Stroke : 56 x 70mm
Capacity : 172cc
Power : 5 cv @ 4000 rpm/min
Flywheel magneto
No gearbox
M1S 98.18cc, 50x50mm, 2-speed, multi-disc clutch, single exhaust, magneto ignition, petroil lube. Single speed (possibly also a two-speed version).
T 42
Bore/Stroke : 70 x 56mm
Capacity : 172cc
Flywheel magneto
No gearbox
200cc 3 speed
Bore/Stroke : 59 x 72mm
Capacity : 197cc
CR : 7.5
Power : 8 cv @ 4600 rpm/min
Flywheel magneto
Gurtner M22D Carburettor
3 speed gearbox with clutch
200cc 4 speed
Bore/Stroke : 59 x 72mm
Capacity : 197cc
CR : 7.5/1
Power : 8 cv @ 4600 rpm/min
Flywheel magneto
Gurtner M22D Carburettor
4-speed gearbox with clutch
Fuel consumption : 3.5 l / 100km
232cc 4 speed
Bore/Stroke : 64 x 72mm
Capacity : 232cc
CR : 7.5/1
Power : 10 cv @ 4800 rpm/min
Flywheel magneto
Gurtner M26D Carburettor
4 speed gearbox with clutch
Fuel consumption : 4.5 l / 100km
Villiers Type 10D
The first models were fitted with a 3-speed gearbox with foot selector. Engine crankcase consists of two half casings with a vertical split. The cylinder has two transfer ports and is made of cast iron, and the cylinder head is made of light aluminium alloy. The electronic ignition is a SAFI SSY magneto flywheel, and the clutch is disc. Primary transmission is by chain.
Specification
Monet-Goyon engines were fitted to Koehler Escoffier motorcycles which were built in the same Mâcon factory.
Prior to building Villiers engines themselves, they imported numerous models from the English factory. These included the Villiers 350 MKVIIIB engine which was fitted to the RC4C of 1927, which in 1929 used the Villiers MK IXB with flywheel magneto. The same engine was fitted to the type B (1928), type BF (1929), type BS (1930) and type BS2 (1931).
The firm also employed MAG powerplants.
See also: Monet-Goyon History and Villiers France.
Sources: JLB Creations, Cycle Memory.
