| YAMAHA YZ250 | APRILIA RS 457 |
|---|
| engine specs | |
| Type | |
|---|---|
| liquid-cooled, reed valve-inducted, 2-stroke | liquid-cooled twin-cylinder engine with dual camshaft timing and four valves per cylinder |
| Displacement | |
| 249 cm3 | - |
| Bore X Stroke | |
| 2.6x2.8 in OR 66 mm | - |
| Compression Ratio | |
| 9.0 – 10.6:1 | - |
| Horsepower | |
| - | 48/- KW(hp)/RPM |
| Fuel System | |
| 38mm Keihin PWK w/power jet & throttle position sensor | - |
| transmission specs | |
| Gearbox | |
|---|---|
| 5 speed, manual | - |
| Clutch | |
| Multiplate wet clutch | - |
| Final Drive | |
| #520 O-ring chain | - |
| chassis specs | |
| Frame | |
|---|---|
| Steel | Aluminium frame |
| Front Suspension | |
| 46mm Kayaba inverted telescopic fork w/adjustable compression and rebound damping 11.8 " travel | - |
| Rear Suspension | |
| Fully adjustable Kayaba single shock, 12.4" travel separate hi/lo speed compression adjustment | - |
| Front Brake | |
| 250mm floating disc | - |
| Rear Brake | |
| 245mm disc | - |
| dimension specs | |
| Overall Length | |
|---|---|
| 85.9 in OR 2182 mm | - |
| Overall Width | |
| 32.6 in OR 828 mm | - |
| Seat Height | |
| 39 in OR 991 mm | - |
| Ground Clearance | |
| 15.6 in OR 396 mm | - |
| Weight | |
| 214 lbs OR 97 kg | 351 lbs OR 159 kg |
| Fuel Capacity | |
| 2.1 gallons OR 7.9 L | - |
| Wheelbase | |
| 58.3 in OR 1481 mm | - |
| tyres specs | |
| Front | |
|---|---|
| 80/100-21 Dunlop | - |
| Rear | |
| 110/90-19 Dunlop | - |
