| Engine | Kawasaki Ninja 250R | Kawasaki Ninja 400 |
|---|---|---|
| Displacement | 249 cc | 399 cc |
| Max power | 32 hp (@11 000 RPM) | 49 hp (@10 000 RPM) |
| Max torque | 22 Nm (@9 500 RPM) | 38 Nm (@8 000 RPM) |
| Redline | 14 000 RPM | 9 500 RPM |
| Idling speed | 1 300 RPM | 1 200 RPM |
| Management | Fuel Injection | Fuel Injection |
| Layout | DOHC Inline-2 | DOHC Inline-2 |
| Compression | 11.60:1 | 11.60:1 |
| Oil capacity | 1.30 litre | |
| Oil type | 10W40, Kawasaki 10W40, Shell Rotella 10W40 | |
| Spark plug type | NGK CR8E | |
| Cooling | Liquid | Liquid |
| Valves | 8 | 8 |
| Bore | 62.0 mm | 70.0 mm |
| Stroke | 41.2 mm | 51.8 mm |
| Throttle bore | 32.0 mm | |
| Weight to power | 5.28 kg/hp | 3.39 kg/hp |
| Power to weight | 189 hp/Ton | 295 hp/Ton |
| Battery type | 12V 8Ah, YTX9-BS |
| Gearbox | Kawasaki Ninja 250R | Kawasaki Ninja 400 |
|---|---|---|
| Type | Sequential | Sequential |
| Clutch | Wet | Slipper |
| Drive | Chain | Chain |
| Chain type | 520 | |
| Gears count | 6 | 6 |
| Primary ratio | 3.087 | 2.219 |
| Final drive | 3.071 | 2.929 |
| 1. gear | 2.6 (66 km/h) | 2.929 (58 km/h) |
| 2. gear | 1.789 (96 km/h) | 2.056 (82 km/h) |
| 3. gear | 1.409 (121 km/h) | 1.619 (104 km/h) |
| 4. gear | 1.16 (147 km/h) | 1.333 (126 km/h) |
| 5. gear | 1.0 (171 km/h) | 1.154 (146 km/h) |
| 6. gear | 0.893 (191 km/h) | 1.037 (163 km/h) |
| Chasis | Kawasaki Ninja 250R | Kawasaki Ninja 400 |
|---|---|---|
| Frame type | Tubular, diamond | Steel trellis frame |
| Front susp. | Telescopic fork, 120.00 mm travel | 41mm fork, 120.00 mm travel |
| Rear susp. | Swingarm (uni-trak), 130.00 mm travel | Monoshock, 130.00 mm travel |