Nortom Commando 850 (1975)

The 1975 Norton Commando 850 is a classic motorcycle with a four stroke, parallel twin cylinder, push rod engine that has a capacity of 829 cc. It has a compression ratio of 8.5:1 and uses 2 x ~A30 mm Amal concentric carburetors for induction. The bike is air cooled and uses a 120W Lucas alternator for ignition. It has both electric and kick start options, and can reach a maximum power of 60 hp at 6200 rpm. The Norton Commando 850 has a metal diaphragm clutch and a 4-speed transmission with a final chain drive. The bike has a twin downtube cradle with Isolastic engine mounts, telescopic front forks, and a swing arm with Girling coil springs for rear suspension. Front and rear brakes are both single disc, and the bike has a 19 liter fuel tank. It can achieve an average fuel consumption of 5.3 L/100 km and has a top speed of 185 km/h. The wet weight of the bike is 233 kg, and it has a standing 1/4 mile time of 14.4 seconds, with a top speed of 145 km/h. Overall, the Norton Commando 850 is a powerful and stylish motorcycle with impressive performance capabilities.


Technical specifications:

Make Model: Norton Commando 850

Year: 1975

Engine: Four stroke, parallel twin cylinder, push rod 2 valves per cylinder.

Capacity: 829 cc / 50.6 cu in



Bore x Stroke: 77 x 89 mm

Compression Ratio: 8.5:1

Cooling System: Air cooled

Induction: 2 x ~A30 mm Amal concentric carburetors

Ignition: 120W Lucas alternator

Starting: Electric and kick

Max Power: 60 hp / 44.7 kW @ 6200 rpm

Clutch: Metal diaphragm clutch

Transmission: 4 Speed

Final Drive: Chain

Frame: Twin downtube cradle with Isolastic engine mounts

Front Suspension: Telescopic forks

Rear Suspension: Swing arm with Girling coil springs


Front Brakes: Single disc

Rear Brakes: Single disc

Front Tyre: 4.10-19

Rear Tyre: 4.10-19

Wet Weight: 233 kg / 514 lbs

Fuel Capacity: 19 Litres / 5.0 US gal

Average Fuel Consumption: 5.3 L/100 km / 18.7 kn/l / 44 US mpg

Standing 1/4 Mile: 14.4 sec / 145 km/h / 90 mph

Top Speed: 185 km/h / 115 mph
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