1974 Norton commando 850 John Player Special technical specifications

Technical specifications

Model: commando 850 John Player Special
Years: 1974
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
Cooling System: Air cooled
Compression Ratio: 8.5:1
Induction: 2 x Ø32 mm Amal carburetors
Starting: Kick
Max Power: 60 hp / 44.7 kW @ 6200 rpm
Transmission: 4 Speed
Final Drive: Chain
Frame: Twin downtube cradle with Isolastic engine mounts
Front Suspension: Telescopic forks
Rear Suspension: Dual shocks
Front Brakes: Single disc
Rear Brakes: Drum
Front Tyre: 3.50 H18
Rear Tyre: 4.10 V18
Wheelbase: 1440 mm / 56.7 in
Dry-Weight: 188 kg / 414 lbs
Fuel Capacity: 12 Litres / 3.2 US gal

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