Velocette Viper (1955-68)
Comparison technical specifications
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| Make: | Velocette |
| Model: | Viper |
| Years: | 1955-68 |
| Engine: | Four stroke, single cylinder |
| Capacity: | 349 cc / 30.5 cub in |
| Bore x Stroke: | 72 x 86 mm |
| Compression Ratio: | 8.0:1 |
| Cooling System: | Air cooled |
| Lubrication: | Wet sump |
| Exhaust: | Single |
| Spark Plug: | KLG FE100 / Champion N3 / NGK B8ES, Lodge 3HLN |
| Battery: | 6V |
| Ignition: | Belt driven dynamo, after 1962: Lucas system |
| Starting: | Kick start |
| Max Power: | 25 kW / 28 hp @ 7000 rpm |
| Clutch: | Dry, three-plate |
| Transmission: | 4 Speed constant mesh, close ratio |
| Final Drive: | Chain |
| Wheelbase: | 1353 mm / 53.25 in |
| Front Suspension: | Telescopic fork with hydraulic compression and rebound damping |
| Rear Suspension: | Woodhead-Monroe springs with hydraulic damping, later Armstrong and Girling, adjustable |
| Front Brakes: | 7.5 x 1.5 in., drum |
| Rear Brakes: | 7 x 1 in., drum |
| Front Wheel: | WM2 x 19 |
| Rear Wheel: | WM2 x 19 |
| Front Tyre: | 3.25 x 19 in |
| Rear Tyre: | 3.25 x 19 in |
| Turning Radius: | 4.9 m / 16 ft. |
| Rake: | 27° |
| Fuel Capacity: | 13.6 L / 3.6 US gal |
| Dry Weight: | 165 kg / 364 lbs |
| Top Speed: | 91 mph |
| Colours: | Willow green |
| Source: | Wikipedia |