| VELOCETTE VIPER | APRILIA RS 457 |
|---|
| engine specs | |
| Type | |
|---|---|
| Single cylinder, 4-stroke, Air-cooled | liquid-cooled twin-cylinder engine with dual camshaft timing and four valves per cylinder |
| Displacement | |
| 349 cm3 | - |
| Bore X Stroke | |
| 2.8x3.4 in OR 71 mm | - |
| Compression Ratio | |
| 8.0:1 | - |
| Horsepower | |
| 28/7000 KW(hp)/RPM | 48/- KW(hp)/RPM |
| Fuel System | |
| Carburetor | - |
| transmission specs | |
| Gearbox | |
|---|---|
| 4-Speed constant mesh, close ratio | - |
| Clutch | |
| Dry, three-plate | - |
| Final Drive | |
| Chain | - |
| chassis specs | |
| Frame | |
|---|---|
| - | Aluminium frame |
| Front Suspension | |
| Telescopic fork with hydraulic compression and rebound damping | - |
| Rear Suspension | |
| Woodhead-Monroe springs with hydraulic damping, later Armstrong and Girling, adjustable | - |
| Front Brake | |
| Drum | - |
| Rear Brake | |
| Drum | - |
| dimension specs | |
| Weelbase | |
|---|---|
| 53.3 in OR 1354 mm | - |
| Weight | |
| 364 lbs OR 165 kg | 351 lbs OR 159 kg |
| Fuel Capacity | |
| 3.6 gallons OR 13.6 L | - |
| Wheelbase | |
| 53.3 in OR 1354 mm | - |
| tyres specs | |
| Front | |
|---|---|
| 3.25 x 19" | - |
| Rear | |
| 3.25 x 19" | - |
