Polini XP 4 Street 125 vs Harley-Davidson SX 125 (2024)
Side-by-side spec comparison, pricing, and a plain-English breakdown of how the Polini XP 4 Street 125stacks up against the Harley-Davidson SX 125. Numbers pulled from manufacturer spec sheets — click either bike for the full review.
Spec comparison
| Spec | Polini XP 4 Street 125 | Harley-Davidson SX 125 |
|---|---|---|
| Model year | 2010 | 2024 |
| Price | — | — |
| Engine | 121 cc | 124 cc |
| Torque | — | 11 Nm |
| Weight | 69 kg | — |
| Seat height | 31 mm | 35 mm |
| Fuel capacity | 0.8 L | 1.9 L |
| Fuel type | petrol | petrol |
| Transmission | 4-speed | 6-speed |
| Front brakes | Single disc | Single disc. Floating calliper |
| Rear brakes | Single disc | Single disc. Floating calliper |
| Tires | 3.50-10 / 3.50-10 | 100/80-R17 / 130/70-R17 |
Polini XP 4 Street 125 vs Harley-Davidson SX 125 — which should you buy?
Picking between the Polini XP 4 Street 125 and the Harley-Davidson SX 125 usually comes down to the numbers you care about most. On paper, the Polini XP 4 Street 125 brings its published horsepower in a 69 kg package, while the Harley-Davidson SX 125 counters with its own power figure.
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: