| MODEL | NORTON COMMANDO 850 JPS 1974 |
| Year | 1974 |
| Engine Type | Four stroke, parallel twin cylinder, pushrod, 2 valves per cylinder |
| Displacement / Capacity | 829 cc / 50.6 cu in |
| Bore X Stroke | 77 x 89 mm |
| Compression Ratio | 8.5:1 |
| Cooling System | Air cooled |
| Max Power | 44.7 kW / 60 hp @ 6200 rpm |
| Max Torque | — |
| Ignition | — |
| Induction | 2 x 32 mm Amal carburettors |
| Start System | Kick |
| TRANSMISSION SPECS | |
| Lubrication | — |
| Gear Box | 4 Speed |
| Clutch | — |
| Final Drive | Chain |
| CHASSIS SPECS | |
| Frame | Twin downtube cradle with Isolastic engine mounts |
| Front Suspension | Telescopic forks |
| Rear Suspension | Dual shocks |
| Front Brakes | Single disc |
| Rear Brakes | Drum |
| DIMENSION SPECS | |
| Overall Length | — |
| Overall Width | — |
| Overall Height | — |
| Seat Height | — |
| Wheelbase | 1440 mm / 56.7 in |
| Ground Clearance | — |
| Dry Weight | 188 kg / 414 lbs |
| Wet Weight | — |
| WHEEL SPECS | |
| Front Tyre | 3.50 H18 |
| Rear Tyre | 4.10 V18 |
| FUEL SYSTEM | |
| Fuel Capacity | 12 Litres / 3.2 US gal |
| Fuel Consumption | — |
| Top Speed | — |
The John Player Special was a limited-run cafe-racer styling of the Commando 850, finished in the colours of the John Player Norton racing team. It added a fibreglass fairing and a tank-and-seat canopy over a steel tank, but the engine was unchanged. Testers found it a standard Commando in racing dress at a noticeably higher price.
