| Engine | Kawasaki Ninja 400 | Yamaha R125 |
|---|---|---|
| Displacement | 399 cc | 124 cc |
| Max power | 49 hp (@10 000 RPM) | 15 hp (@10 000 RPM) |
| Max torque | 28 lb ft (@8 000 RPM) | 8 lb ft (@8 000 RPM) |
| Redline | 9 500 RPM | 10 000 RPM |
| Idling speed | 1 200 RPM | 1 200 RPM |
| Management | Fuel Injection | Fuel Injection |
| Layout | DOHC Inline-2 | SOHC Single |
| Compression | 11.60:1 | 11.20:1 |
| Oil capacity | 1.14 quart | |
| Cooling | Liquid | Liquid |
| Valves | 8 | 4 |
| Bore | 70.0 mm | 52.0 mm |
| Stroke | 51.8 mm | 58.6 mm |
| Throttle bore | 32.0 mm | |
| Weight to power | 7.47 lbs/hp | 20.87 lbs/hp |
| Power to weight | 334 hp/2500lbs | 119 hp/2500lbs |
| Battery type | 12V 5.5Ah |
| Gearbox | Kawasaki Ninja 400 | Yamaha R125 |
|---|---|---|
| Type | Sequential | Sequential |
| Clutch | Slipper | Wet |
| Drive | Chain | Chain |
| Chain type | ||
| Gears count | 6 | 6 |
| Primary ratio | 2.219 | 3.042 |
| Final drive | 2.929 | 3.42 |
| 1. gear | 2.929 (36 mph) | 2.833 (24 mph) |
| 2. gear | 2.056 (51 mph) | 1.875 (37 mph) |
| 3. gear | 1.619 (65 mph) | 1.364 (51 mph) |
| 4. gear | 1.333 (78 mph) | 1.143 (60 mph) |
| 5. gear | 1.154 (91 mph) | 0.957 (72 mph) |
| 6. gear | 1.037 (101 mph) | 0.84 (82 mph) |
| Chasis | Kawasaki Ninja 400 | Yamaha R125 |
|---|---|---|
| Frame type | Steel trellis frame | Steel deltabox |
| Front susp. | 41mm fork, 4.72 in travel | KYB 41mm USD, 5.12 in travel |
| Rear susp. | Monoshock, 5.12 in travel | Swingarm monoshock, 4.49 in travel |