| Engine | Yamaha R125 | Yamaha R3 |
|---|---|---|
| Displacement | 124 cc | 321 cc |
| Max power | 15 hp (@10 000 RPM) | 42 hp (@10 750 RPM) |
| Max torque | 11 Nm (@8 000 RPM) | 29 Nm (@9 000 RPM) |
| Redline | 10 000 RPM | 12 245 RPM |
| Idling speed | 1 200 RPM | 1 200 RPM |
| Management | Fuel Injection | Fuel Injection |
| Layout | SOHC Single | DOHC Inline-2 |
| Compression | 11.20:1 | 11.20:1 |
| Oil capacity | 1.20 litre | 2.40 litre |
| Oil type | 10W40, Motul 300V 10W40, Shell Rotella 10W40 | |
| Spark plug type | NGK CR8E | |
| Cooling | Liquid | Liquid |
| Valves | 4 | 4 |
| Bore | 52.0 mm | 68.0 mm |
| Stroke | 58.6 mm | 44.1 mm |
| Weight to power | 9.47 kg/hp | 3.95 kg/hp |
| Power to weight | 105 hp/Ton | 253 hp/Ton |
| Battery type | 12V 5.5Ah | 12V, 7.0 Ah, GTZ8V |
| Gearbox | Yamaha R125 | Yamaha R3 |
|---|---|---|
| Type | Sequential | Sequential |
| Clutch | Wet | Wet |
| Drive | Chain | Chain |
| Chain type | ||
| Gears count | 6 | 6 |
| Primary ratio | 3.042 | 3.043 |
| Final drive | 3.42 | 3.071 |
| 1. gear | 2.833 (39 km/h) | 2.5 (62 km/h) |
| 2. gear | 1.875 (59 km/h) | 1.824 (85 km/h) |
| 3. gear | 1.364 (82 km/h) | 1.348 (115 km/h) |
| 4. gear | 1.143 (97 km/h) | 1.087 (143 km/h) |
| 5. gear | 0.957 (116 km/h) | 0.92 (169 km/h) |
| 6. gear | 0.84 (132 km/h) | 0.8 (194 km/h) |
| Chasis | Yamaha R125 | Yamaha R3 |
|---|---|---|
| Frame type | Steel deltabox | Diamond |
| Front susp. | KYB 41mm USD, 130.00 mm travel | Telescopic fork, coil spring, oil damper, 130 mm travel |
| Rear susp. | Swingarm monoshock, 114.00 mm travel | Swingarm, spring/shock absorber, coil spring/oil damper, 130 mm travel |