| Engine | KTM 390 Duke | Kawasaki Ninja 400 |
|---|---|---|
| Displacement | 373 cc | 399 cc |
| Max power | 43 hp (@8 600 RPM) | 49 hp (@10 000 RPM) |
| Max torque | 34 Nm (@6 800 RPM) | 38 Nm (@8 000 RPM) |
| Redline | 10 500 RPM | 9 500 RPM |
| Idling speed | 1 650 RPM | 1 200 RPM |
| Management | Fuel Injection | Fuel Injection |
| Layout | DOHC Single | DOHC Inline-2 |
| Compression | 12.90:1 | 11.60:1 |
| Oil type | 15W50 | |
| Spark plug type | BOSCH VR 5 NE, BOSCH VR 5 NEU | |
| Cooling | Liquid | Liquid |
| Valves | 4 | 8 |
| Bore | 89.0 mm | 70.0 mm |
| Stroke | 60.0 mm | 51.8 mm |
| Throttle bore | 32.0 mm | |
| Weight to power | 3.65 kg/hp | 3.39 kg/hp |
| Power to weight | 273 hp/Ton | 295 hp/Ton |
| Gearbox | KTM 390 Duke | Kawasaki Ninja 400 |
|---|---|---|
| Type | Sequential | Sequential |
| Clutch | Wet | Slipper |
| Drive | Chain | Chain |
| Chain type | X-Ring 5/8 x 1/4" | |
| Gears count | 6 | 6 |
| Primary ratio | 2.667 | 2.219 |
| Final drive | 3.0 | 2.929 |
| 1. gear | 2.667 (57 km/h) | 2.929 (58 km/h) |
| 2. gear | 1.857 (81 km/h) | 2.056 (82 km/h) |
| 3. gear | 1.421 (107 km/h) | 1.619 (104 km/h) |
| 4. gear | 1.143 (132 km/h) | 1.333 (126 km/h) |
| 5. gear | 0.956 (158 km/h) | 1.154 (146 km/h) |
| 6. gear | 0.84 (180 km/h) | 1.037 (163 km/h) |
| Chasis | KTM 390 Duke | Kawasaki Ninja 400 |
|---|---|---|
| Frame type | Steel trellis frame | Steel trellis frame |
| Front susp. | USD 43mm, 150.00 mm travel | 41mm fork, 120.00 mm travel |
| Rear susp. | Monoshock, 150.00 mm travel | Monoshock, 130.00 mm travel |