2026 Yamaha YZ125 vs 2026 Yamaha YZ125X
Side-by-side specs. Differences are highlighted. Blank = not yet verified for that year-model (we don’t guess).
Yamaha
Yamaha| Spec | 2026 Yamaha YZ125 | 2026 Yamaha YZ125X |
|---|---|---|
| Class | 125cc 2-stroke | 125cc 2-stroke |
| Displacement | 125cc | — |
| Bore × stroke | 54 × 54.5 mm | 54 × 54.5 mm |
| Cooling | — | — |
| Induction | reed-valve inducted | reed-valve inducted |
| Power valve | — | — |
| Starter | — | — |
| Transmission | 6-speed | 6-speed |
| Front suspension | KYB Speed-Sensitive System inverted fork; fully adjustable | KYB Speed-Sensitive System inverted fork; fully adjustable, 11.8-in travel |
| Front travel | 11.8 in | 11.8 in |
| Rear travel | 12.4 in | 12.4 in |
| Front brake | 270mm | 270mm |
| Rear brake | 240mm | 240mm |
| Front wheel | 21" | — |
| Rear wheel | 19" | — |
| Seat height | 38.6 in | 38.2 in |
| Wheelbase | 56.9 in | 57.3 in |
| Weight | 212 lb (Wet weight) | 212 lb (wet weight) |
| Fuel capacity | 1.8 gal | 1.8 gal |
| MSRP | — | — |
Highlighted (blue) rows differ between the two. Verified manufacturer data; see each bike’s page for sources. Torque/fluid specs are on the individual pages (service-manual only).