| Engine | Kawasaki Z400 | KTM 390 Duke |
|---|---|---|
| Displacement | 399 cc | 373 cc |
| Max power | 45 hp (@10 000 RPM) | 43 hp (@8 600 RPM) |
| Max torque | 28 lb ft (@8 000 RPM) | 25 lb ft (@6 800 RPM) |
| Redline | 12 000 RPM | 10 500 RPM |
| Idling speed | 1 300 RPM | 1 650 RPM |
| Management | Fuel Injection | Fuel Injection |
| Layout | DOHC Inline-2 | DOHC Single |
| Compression | 11.50:1 | 12.90:1 |
| Oil capacity | 1.89 quart | |
| Oil type | SAE 10W40 | 15W50 |
| Spark plug type | NGK LMAR9G | BOSCH VR 5 NE, BOSCH VR 5 NEU |
| Cooling | Liquid | Liquid |
| Valves | 8 | 4 |
| Bore | 70.0 mm | 89.0 mm |
| Stroke | 51.8 mm | 60.0 mm |
| Throttle bore | 32.0 mm | |
| Weight to power | 8.18 lbs/hp | 8.05 lbs/hp |
| Power to weight | 305 hp/2500lbs | 310 hp/2500lbs |
| Battery type | 12V 8Ah |
| Gearbox | Kawasaki Z400 | KTM 390 Duke |
|---|---|---|
| Type | Sequential | Sequential |
| Clutch | Wet | Wet |
| Drive | Chain | Chain |
| Chain type | 520 | X-Ring 5/8 x 1/4" |
| Gears count | 6 | 6 |
| Primary ratio | 2.219 | 2.667 |
| Final drive | 2.929 | 3.0 |
| 1. gear | 2.929 (45 mph) | 2.667 (35 mph) |
| 2. gear | 2.056 (65 mph) | 1.857 (50 mph) |
| 3. gear | 1.619 (82 mph) | 1.421 (66 mph) |
| 4. gear | 1.333 (99 mph) | 1.143 (82 mph) |
| 5. gear | 1.154 (115 mph) | 0.956 (98 mph) |
| 6. gear | 1.037 (127 mph) | 0.84 (112 mph) |
| Chasis | Kawasaki Z400 | KTM 390 Duke |
|---|---|---|
| Frame type | Trellis frame | Steel trellis frame |
| Front susp. | 41mm fork, 4.72 in travel | USD 43mm, 5.91 in travel |
| Rear susp. | Monoshock, 5.12 in travel | Monoshock, 5.91 in travel |