| Engine | Yamaha MT-125 | Yamaha YBR 125 |
|---|---|---|
| Displacement | 124 cc | 125 cc |
| Max power | 15 hp (@9 000 RPM) | 10 hp (@7 800 RPM) |
| Max torque | 8 lb ft (@8 000 RPM) | 6 lb ft (@6 000 RPM) |
| Redline | 10 000 RPM | 10 000 RPM |
| Idling speed | 1 200 RPM | 1 250 RPM |
| Management | Fuel Injection | Fuel Injection |
| Layout | SOHC Single | SOHC Single |
| Compression | 11.20:1 | 10.00:1 |
| Oil capacity | 1.14 quart | 1.14 quart |
| Oil type | 10W30, 10W40 | |
| Spark plug type | NGK CR6HSA | |
| Cooling | Liquid | Air |
| Valves | 4 | 2 |
| Bore | 52.0 mm | 54.0 mm |
| Stroke | 58.6 mm | 54.0 mm |
| Weight to power | 20.58 lbs/hp | 28.66 lbs/hp |
| Power to weight | 121 hp/2500lbs | 87 hp/2500lbs |
| Battery type | 12V 5.5Ah | YTX7L-BS, 12V 6Ah |
| Gearbox | Yamaha MT-125 | Yamaha YBR 125 |
|---|---|---|
| Type | Sequential | Sequential |
| Clutch | Wet | Wet |
| Drive | Chain | Chain |
| Chain type | ||
| Gears count | 6 | 5 |
| Primary ratio | 3.042 | 3.4 |
| Final drive | 3.42 | 3.071 |
| 1. gear | 2.833 (24 mph) | 2.643 (26 mph) |
| 2. gear | 1.875 (37 mph) | 1.778 (39 mph) |
| 3. gear | 1.364 (51 mph) | 1.316 (53 mph) |
| 4. gear | 1.143 (60 mph) | 1.045 (66 mph) |
| 5. gear | 0.957 (72 mph) | 0.875 (79 mph) |
| 6. gear | 0.84 (82 mph) |
| Chasis | Yamaha MT-125 | Yamaha YBR 125 |
|---|---|---|
| Frame type | Steel deltabox | Diamond steel |
| Front susp. | KYB 41mm USD, 5.12 in travel | Telescopic fork, 110mm |
| Rear susp. | Swingarm monoshock, 4.49 in travel | Swingarm, 4.13 in travel |