| Engine | Yamaha R1 | Yamaha R125 |
|---|---|---|
| Displacement | 998 cc | 124 cc |
| Max power | 152 hp (@10 500 RPM) | 15 hp (@10 000 RPM) |
| Max torque | 76 lb ft (@8 500 RPM) | 8 lb ft (@8 000 RPM) |
| Redline | 11 750 RPM | 10 000 RPM |
| Idling speed | 1 200 RPM | 1 200 RPM |
| Management | Fuel Injection | Fuel Injection |
| Layout | DOHC Inline-4 | SOHC Single |
| Compression | 11.80:1 | 11.20:1 |
| Oil capacity | 1.14 quart | |
| Cooling | Liquid | Liquid |
| Valves | 20 | 4 |
| Bore | 74.0 mm | 52.0 mm |
| Stroke | 58.0 mm | 58.6 mm |
| Throttle bore | 40.0 mm | |
| Weight to power | 2.80 lbs/hp | 20.87 lbs/hp |
| Power to weight | 893 hp/2500lbs | 119 hp/2500lbs |
| Battery type | 12V 5.5Ah |
| Gearbox | Yamaha R1 | Yamaha R125 |
|---|---|---|
| Type | Sequential | Sequential |
| Clutch | Wet | Wet |
| Drive | Chain | Chain |
| Chain type | 530 O-ring | |
| Gears count | 6 | 6 |
| Primary ratio | 1.581 | 3.042 |
| Final drive | 2.685 | 3.42 |
| 1. gear | 2.5 (81 mph) | 2.833 (24 mph) |
| 2. gear | 1.842 (109 mph) | 1.875 (37 mph) |
| 3. gear | 1.5 (134 mph) | 1.364 (51 mph) |
| 4. gear | 1.333 (151 mph) | 1.143 (60 mph) |
| 5. gear | 1.2 (168 mph) | 0.957 (72 mph) |
| 6. gear | 1.115 (181 mph) | 0.84 (82 mph) |
| Chasis | Yamaha R1 | Yamaha R125 |
|---|---|---|
| Frame type | Twin-spar aluminium | Steel deltabox |
| Front susp. | 43mm USD, 4.72 in travel | KYB 41mm USD, 5.12 in travel |
| Rear susp. | Swingarm monoshock, 5.12 in travel | Swingarm monoshock, 4.49 in travel |