| MODEL | NORTON DOMINATOR 99SS 1961 - 1962 |
| Year | 1961 - 1962 |
| Engine Type | Four-stroke parallel twin, OHV |
| Displacement / Capacity | 596 cc / 36.4 cu in |
| Bore X Stroke | 68 x 82 mm |
| Compression Ratio | 7.4:1 |
| Cooling System | Air cooled |
| Max Power | 23.1 kW / 31 hp @ 6500 rpm |
| Max Torque | — |
| Ignition | Coil |
| Induction | Amal 376 carburettor |
| Start System | Kick |
| TRANSMISSION SPECS | |
| Lubrication | — |
| Gear Box | 4-speed |
| Clutch | — |
| Final Drive | Chain |
| CHASSIS SPECS | |
| Frame | Featherbed duplex cradle |
| Front Suspension | Telescopic fork |
| Rear Suspension | — |
| Front Brakes | — |
| Rear Brakes | — |
| DIMENSION SPECS | |
| Overall Length | — |
| Overall Width | — |
| Overall Height | — |
| Seat Height | — |
| Wheelbase | — |
| Ground Clearance | — |
| Dry Weight | — |
| Wet Weight | — |
| WHEEL SPECS | |
| Front Tyre | — |
| Rear Tyre | — |
| FUEL SYSTEM | |
| Fuel Capacity | — |
| Fuel Consumption | — |
| Top Speed | — |
The 99SS was the sports version of the 600 cc Dominator twin, with the Featherbed frame and the 596 cc engine. It sat just before the 650SS, which took over as the large sporting Dominator.
