| VELOCETTE MAC | APRILIA RS 457 |
|---|
| engine specs | |
| Type | |
|---|---|
| Single cylinder, OHV, 4-stroke, air-cooled | liquid-cooled twin-cylinder engine with dual camshaft timing and four valves per cylinder |
| Displacement | |
| 349 cm3 | - |
| Bore X Stroke | |
| 2.7x3.8 in OR 69 mm | - |
| Compression Ratio | |
| 6.75:1 | - |
| Horsepower | |
| 15/6300 KW(hp)/RPM | 48/- KW(hp)/RPM |
| Fuel System | |
| Carburetor | - |
| transmission specs | |
| Gearbox | |
|---|---|
| 4-Speed | - |
| Clutch | |
| Three-plate | - |
| Final Drive | |
| Chain | - |
| chassis specs | |
| Frame | |
|---|---|
| Single top and front down tubes and twin tube cradle | Aluminium frame |
| Front Suspension | |
| Pre war: Webb girder style - Post war: Air-sprung Dowty Oleomatic forks | - |
| Rear Suspension | |
| Hydraulic shocks | - |
| Front Brake | |
| Drum | - |
| Rear Brake | |
| Drum | - |
| dimension specs | |
| Seat Height | |
|---|---|
| 27.6 in OR 701 mm | - |
| Weelbase | |
| 50.2 in OR 1275 mm | - |
| Weight | |
| 375 lbs OR 170 kg | 351 lbs OR 159 kg |
| Fuel Capacity | |
| 3 gallons OR 11.4 L | - |
| Wheelbase | |
| 50.2 in OR 1275 mm | - |
| tyres specs | |
| Front | |
|---|---|
| 3.25 x 19" | - |
| Rear | |
| 3.25 x 19" | - |
