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