| BSA B50 MX | APRILIA RS 457 |
|---|
| engine specs | |
| Type | |
|---|---|
| air-cooled, four-stroke, single cylinder, OHV | liquid-cooled twin-cylinder engine with dual camshaft timing and four valves per cylinder |
| Displacement | |
| 499 cm3 | - |
| Bore X Stroke | |
| 3.3x3.5 in OR 84 mm | - |
| Compression Ratio | |
| 10.0:1 | - |
| Horsepower | |
| 34/6200 KW(hp)/RPM | 48/- KW(hp)/RPM |
| Torque | |
| 28/5000 lb-ft/RPM OR 38/5000 Nm/RPM | - |
| Fuel System | |
| Amal carburetor | - |
| transmission specs | |
| Gearbox | |
|---|---|
| 4-speed, manual | - |
| Clutch | |
| wet multi-disc, manual | - |
| Final Drive | |
| chain | - |
| chassis specs | |
| Frame | |
|---|---|
| steel | Aluminium frame |
| Front Suspension | |
| telescopic fork | - |
| Rear Suspension | |
| dual shocks | - |
| Front Brake | |
| drum | - |
| Rear Brake | |
| drum | - |
| dimension specs | |
| Overall Length | |
|---|---|
| 85 in OR 2159 mm | - |
| Overall Width | |
| 29 in OR 737 mm | - |
| Seat Height | |
| 32 in OR 813 mm | - |
| Weelbase | |
| 54 in OR 1372 mm | - |
| Ground Clearance | |
| 7 in OR 178 mm | - |
| Weight | |
| 309 lbs OR 140 kg | 351 lbs OR 159 kg |
| Fuel Capacity | |
| 2.4 gallons OR 9.1 L | - |
| Wheelbase | |
| 54 in OR 1372 mm | - |
| tyres specs | |
| Front | |
|---|---|
| 3.25 x 18 | - |
| Rear | |
| 3.5 x 18 | - |
