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Nortom Commando 850 (1975)

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Nortom Commando 850 (1975)

At a glance

Capacity
829 cc / 50.6 cu in
Power
60 hp / 44.7 kW @ 6200 rpm

The full picture.

The Norton Commando 850 Roadster MKII motorcycle was introduced in 1975 and featured a four-stroke, parallel-twin-cylinder engine with pushrod 2 valves per cylinder. It had a capacity of 829 cc and a compression ratio of 8.5:1. The bike was air-cooled and used 2 Amal carbs for induction. The ignition was powered by a 120W Lucas alternator and it had both electric and kick starting options. The Norton Commando 850 had a maximum power output of 60 hp at 6200 rpm, with a transmission of 4 speeds and a metal diaphragm clutch. The final drive was through a chain. The frame was a twin downtube cradle with Isolastic engine mounts, while the suspension consisted of telescopic forks at the front and a swing arm with Girling coil springs at the rear. The front and rear brakes were single discs, and the tires were 4.10-19 at both front and rear. The bike’s wet weight was 233 kg, and the fuel capacity was 19 liters. It had an average fuel consumption of 5.3 L/100 km and a top speed of 185 km/h. Its standing 1/4 mile time was 14.4 seconds with a speed of 145 km/h or 90 mph. The Norton Commando 850 Roadster MKII was a popular motorcycle during its time and continues to enjoy a cult following among enthusiasts.


Technical specifications:

Make Model: Norton Commando 850 Roadster MKII

Motorcycle technical specifications
Year1975
EngineFour stroke, parallel twin cylinder, push rod 2 valves per cylinder.
Capacity829 cc / 50.6 cu in
Bore x Stroke77 x 89 mm
Compression Ratio8.5:1
Cooling SystemAir cooled
Induction2 x ~A32 mm Amal concentric carburetors
Ignition120W Lucas alternator
StartingElectric and kick
Max Power60 hp / 44.7 kW @ 6200 rpm
ClutchMetal diaphragm clutch
Transmission4 Speed
Final DriveChain
FrameTwin downtube cradle with Isolastic engine mounts
Front SuspensionTelescopic forks
Rear SuspensionSwing arm with Girling coil springs
Front BrakesSingle disc
Rear BrakesSingle disc
Front Tyre4.10-19
Rear Tyre4.10-19
Wet Weight233 kg / 514 lbs
Fuel Capacity19 Litres / 5.0 US gal
Average Fuel Consumption5.3 L/100 km / 18.7 kn/l / 44 US mpg
Standing 1/4 Mile14.4 sec / 145 km/h / 90 mph
Top Speed185 km/h / 115 mph