UM Xtreet RS 125 vs Fosti F21 (2023)
Side-by-side spec comparison, pricing, and a plain-English breakdown of how the UM Xtreet RS 125stacks up against the Fosti F21. Numbers pulled from manufacturer spec sheets — click either bike for the full review.
Spec comparison
| Spec | UM Xtreet RS 125 | Fosti F21 |
|---|---|---|
| Model year | 2023 | 2022 |
| Price | — | — |
| Engine | 124 cc | 124 cc |
| Horsepower | 12 hp | 10 hp |
| Torque | 10 Nm | 9 Nm |
| Weight | — | 102 kg |
| Seat height | 33 mm | — |
| Fuel capacity | 3.4 L | 2.7 L |
| Fuel type | petrol | petrol |
| Transmission | 6-speed | — |
| Front brakes | Single disc. Combined braking system (CBS) | Expanding brake (drum brake) |
| Rear brakes | Single disc | Expanding brake (drum brake) |
| Tires | 110/60-17 / 140/60-17 | 2.75-18 / 3-18 |
UM Xtreet RS 125 vs Fosti F21 — which should you buy?
Picking between the UM Xtreet RS 125 and the Fosti F21 usually comes down to the numbers you care about most. On paper, the UM Xtreet RS 125 brings 12 hp, while the Fosti F21 counters with 10 hp at 102 kg.
Our spec tables above highlight the winning number on each line. For the full rider-focused reviews including real-world fuel economy, service costs and available colors, click into either bike: