| YAMAHA RD 400 | APRILIA RS 457 |
|---|
| engine specs | |
| Type | |
|---|---|
| Air Cooled, Two Stroke, Parallel Twin Cylinder | liquid-cooled twin-cylinder engine with dual camshaft timing and four valves per cylinder |
| Displacement | |
| 398 cm3 | - |
| Bore X Stroke | |
| 2.5x2.4 in OR 64 mm | - |
| Compression Ratio | |
| 6.2:1 | - |
| Horsepower | |
| 44/8000 KW(hp)/RPM | 48/- KW(hp)/RPM |
| Torque | |
| 30/0 lb-ft/RPM OR 41/0 Nm/RPM | - |
| Fuel System | |
| 2x28mm Mikuni Carburetors | - |
| transmission specs | |
| Gearbox | |
|---|---|
| 6-Speed | - |
| Clutch | |
| Wet multi-plate | - |
| Final Drive | |
| Chain | - |
| chassis specs | |
| Frame | |
|---|---|
| - | Aluminium frame |
| Front Suspension | |
| Telescopic Forks | - |
| Rear Suspension | |
| Swingarm | - |
| Front Brake | |
| Single disc 267 mm | - |
| Rear Brake | |
| Single disc 267 mm | - |
| dimension specs | |
| Overall Length | |
|---|---|
| 78.5 in OR 1994 mm | - |
| Overall Width | |
| 29.9 in OR 759 mm | - |
| Seat Height | |
| 31.5 in OR 800 mm | - |
| Ground Clearance | |
| 5.9 in OR 150 mm | - |
| Weight | |
| 377 lbs OR 171 kg | 351 lbs OR 159 kg |
| Fuel Capacity | |
| 4.4 gallons OR 16.7 L | - |
| Wheelbase | |
| 52 in OR 1321 mm | - |
| tyres specs | |
| Front | |
|---|---|
| 3.25-18 | - |
| Rear | |
| 3.50-18 | - |
