2025 Yamaha YZ125X Specifications
| Manufacturer | Yamaha |
| Model Year | 2025 |
| Model | YZ125X |
| Model Code | YZ125XS |
| Stock Number | 2025439 |
| Color | Team Yamaha Blue |
| Brakes | Front: Hydraulic disc, 270 mm Rear: Hydraulic disc, 240 mm |
| Tires | Front: 80/100-21 Dunlop Geomax MX33F Rear: 110/100-18 Dunlop Geomax MX33 |
| Length | 84.8 in. (215.5 cm) |
| Height | 50.8 in. (129.0 cm) |
| Width | 32.5 in. (82.6 cm) |
| Weight | Wet: 212 lb. (96.2 kg) |
| Ground Clearance | Max. 14 in. (35.6 cm) |
| Wheelbase | 57.3 in. (145.5 cm) |
| Seat Height | 38.2 in. (97.0 cm) |
| Transmission | 6-speed |
| Final Drive | Chain |
| Engine | 2-stroke; reed-valve inducted |
| Cooling | Liquid |
| Displacement | 125 cc |
| Bore x Stroke | 54.0 mm x 54.5 mm |
| Compression Ratio | 7.8 ~ 10.2:1 |
| Clutch | Multiplate wet |
| Fuel System | Hitachi Astemo Keihin PWK38S |
| Fuel Capacity | 1.8 gal. (6.8 L) |
| Front Suspension | KYB Speed-Sensitive System inverted fork, fully adjustable, 11.8 in. (30.0 cm) travel |
| Rear Suspension | KYB single shock, fully adjustable, 12.4 in. (31.5 cm) travel |
| Rake | 26.4° caster angle |
| Trail | 4.4 in. (11.2 cm) |
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