Categories: ACMoto Guzzi

Moto Guzzi 850 Le Mans Mark 1 (1977)

The Moto Guzzi 850 Le Mans Mark I was produced in 1977 and had a four-stroke, V-twin engine that was longitudinally mounted with OHV pushrod and 2 valves per cylinder. The bike had a capacity of 844cc with a compression ratio of 10.2:1 and was air-cooled. It had a gear-driven oil pump with a replaceable full flow oil filter for lubrication, and an induction of 2x 36mm Dell’Orto carburetors. The ignition was battery-powered with double contact breakers and coils, and the bike had electric starting. With a maximum power of 80 hp at 7300 rpm and max torque of 79 Nm at 6000 rpm, the Moto Guzzi 850 Le Mans Mark I had a top speed of 126 mph. The motorcycle had a 5-speed transmission and a final drive shaft, with a duplex cradle frame, telescopic fork front suspension, and swinging arm 5-way adjustable coil spring preload rear suspension. The braking system was 2x 300mm discs for the front and a single 242mm disc for the rear. It had a wheelbase of 1470mm, seat height of 775mm, ground clearance of 184mm, and a dry weight of 198kg with a fuel capacity of 22.5 litres. The bike could deliver an average fuel consumption of 39.6 mpg.


Technical specifications:

Make Model: Moto Guzzi 850 Le Mans Mark I

Year: 1977

Engine: Four stroke, 90 degrees V twin, longitudinally mounted, OHV pushrod, 2 valves per cylinder

Capacity: 844 cc / 51.5 cu-in



Bore x Stroke: 83 x 78 mm

Cooling System: Air cooled

Compression Ratio: 10.2:1

Lubrication: Gear driven oil pump with replaceable full flow oil filter

Induction: 2x 36mm Dell’Orto carburetors

Ignition: Battery with double contact breakers and coils

Starting: Electric

Max Power: 80 hp / 59.7 kW @ 7300 rpm

Max Torque: 79 Nm / 57.5 lb-ft @ 6000 rpm

Transmission: 5 Speed

Final Drive: Shaft

Frame: Duplex cradle

Front Suspension: Telescopic forks


Rear Suspension: Swinging arm, 5-WAY adjustable coil springs preload

Front Brakes: 2x 300mm discs

Rear Brakes: Single 242mm disc

Front Tyre: 3.5H-18

Rear Tyre: 4.10V-18

Wheelbase: 1470 mm / 57.9 in

Seat Height: 775 mm / 30.5 in

Ground Clearance: 184 mm / 7.2 in

Dry Weight: 198 kg / 435 lbs

Wet Weight: 232 kg / 512 lbs


Fuel Capacity: 22.5 Litres / 5.9 US gal

Consumption Average: 39.6 mpg

Top Speed: 126 mph
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