| MODEL | VELOCETTE MSS VELOCETTE MSS COMPÉ-CLIENT 1954 |
| Year | 1954 |
| Engine Type | Four stroke, single cylinder, OHV |
| Displacement / Capacity | 499 cc / 30.5 cu in |
| Bore X Stroke | 86 x 86 mm |
| Compression Ratio | 6.75:1 |
| Cooling System | — |
| Max Power | 17 kW / 23 hp @ 5000 rpm |
| Max Torque | — |
| Ignition | — |
| Induction | — |
| Start System | — |
| TRANSMISSION SPECS | |
| Lubrication | — |
| Gear Box | — |
| Clutch | — |
| Final Drive | — |
| CHASSIS SPECS | |
| Frame | — |
| Front Suspension | — |
| Rear Suspension | — |
| Front Brakes | — |
| Rear Brakes | — |
| DIMENSION SPECS | |
| Overall Length | — |
| Overall Width | — |
| Overall Height | — |
| Seat Height | — |
| Wheelbase | — |
| Ground Clearance | — |
| Dry Weight | 170 kg / 375 lbs |
| Wet Weight | — |
| WHEEL SPECS | |
| Front Tyre | — |
| Rear Tyre | — |
| FUEL SYSTEM | |
| Fuel Capacity | — |
| Fuel Consumption | — |
| Top Speed | 129 km/h / 80 mph |
A Comp-client machine was an MSS engine and frame supplied by the factory to private riders for competition, usually scrambles. Owners tuned them further, often adding Venom camshaft, magneto and carburettor parts, which could lift output sharply above the roadster's.
