1975 Norton Commando 850 MkIII

MINI REVIEW

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Brief History of Norton Motorcycles

Founded in 1898 First motorcycle built in 1902 Many models built through the years For road, racing, military and police use

20101902 1922 1952 1975

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Commando Predecessors

Norton Navigator 1960

Norton Dominator 1961

Norton Atlas 1966

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Significant Changes and Improvements

Although the 850 Commando looked very similar to the 750, there were made a number of significant mechanical changes, including:

Fixes to the Combat engine – camshaft and roller main bearing

Foot gear change moved to left side to match USA and Japan

Rear disc brake introduced

Electric starter motor introduced

Isolastic engine mounts to reduce engine vibration

30 kilograms heavier

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Basic Specs

1975 Norton Commando MK 3

Country: Great BritainEngine: Air-cooled, vertical twin 4-strokePower Rating: 60bhp @ 6,500rpmBore x Stroke: 77 x 89mmDisplacement: 828ccValves: Overhead, pushrod-activatedFuel System: Twin Amal concentris 32mm carburetorsTransmission: 4-speedSuspension: Front Norton Roadholder telescopic fork, rear twin shockBrakes: Front and rear Norton-Lockhead single discWeight: 515lb.Top Speed: 115mph

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Retained Commando Look

750 Commando

850 Commando

Additional Information

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SPECIFICATIONS – 1975 Norton Commando 850 MkIII (Interstate)

Engine:            828cc four stroke OHV parallel twinBore/Stroke:        77 x 89mmCompression:        8.5:1Power/Torque:        58hp @ 5900rpm / 48.5ft/lb @ 5000rpmFuel System:        Two 32mm Amal carburettorsCooling System:        AirElectrical System:        12 voltIgnition:            Battery/coilTransmission/Drive:    4 speed manual/chain driveFront Suspension:    Telescopic forksRear Suspension:        Swingarm with twin coilover shocksFront Brake:        10.7 inch (272 mm) disc w/single piston caliperRear Brake:        10.7 inch (272 mm) disc w/single piston caliperFront Tyre:        4.10 x 19 inchRear Tyre:        4.10 x 19 inchWeight:            492lb (223 kg) wetSeat Height:        32 inch (813 mm)Wheelbase:        57 inch (1448 mm)Fuel Capacity:        5.25 gal (24 Lt) Roadsters had 2.75 gal (12 Lt) tanksTop Speed:        177 kph (approx)

Full Specs

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Norton Commando Rat Bike