Velocette Viper (1955-68) vs AJS NAC 12 (2012-14)
Comparison technical specifications
Add bike |
Remove bike |
Remove bike |
| Make: | Velocette | AJS |
| Model: | Viper | NAC 12 |
| Years: | 1955-68 | 2012-14 |
| Engine: | Four stroke, single cylinder | Twin cylinder, 4 stroke |
| Capacity: | 349 cc / 30.5 cub in | 124 cc / 7.6 cub in |
| Bore x Stroke: | 72 x 86 mm | 44 x 40 mm |
| Cooling System: | Air cooled | Liquid cooled |
| Exhaust: | Single | 2-into-2 |
| Battery: | 6V | 12V |
| Ignition: | Belt driven dynamo, after 1962: Lucas system | Coil CDI |
| Starting: | Kick start | Electric |
| Max Power: | 25 kW / 28 hp @ 7000 rpm | 8.5 kW / 11.4 hp @ 10500 rpm |
| Clutch: | Dry, three-plate | Wet, multi plate |
| Transmission: | 4 Speed constant mesh, close ratio | 5-Speed |
| Final Drive: | Chain | Chain |
| Wheelbase: | 1353 mm / 53.25 in | 1510 mm / 59.4 in |
| Front Suspension: | Telescopic fork with hydraulic compression and rebound damping | Telescopic forks |
| Rear Suspension: | Woodhead-Monroe springs with hydraulic damping, later Armstrong and Girling, adjustable | Twin rear shocks |
| Front Brakes: | 7.5 x 1.5 in., drum | Twin disc |
| Rear Brakes: | 7 x 1 in., drum | Single disc |
| Front Tyre: | 3.25 x 19 in | 100/80-17 |
| Rear Tyre: | 3.25 x 19 in | 130/70-17 |
| Fuel Capacity: | 13.6 L / 3.6 US gal | 18 L / 4.8 US gal |
| Dry Weight: | 165 kg / 364 lbs | 153 kg / 337 lbs |
| Colours: | Willow green | White, Red, Black |