Yamaha Neos 4S vs Hyosung SF 50B (2009)
Side-by-side spec comparison, pricing, and a plain-English breakdown of how the Yamaha Neos 4Sstacks up against the Hyosung SF 50B. Numbers pulled from manufacturer spec sheets — click either bike for the full review.
Spec comparison
| Spec | Yamaha Neos 4S | Hyosung SF 50B |
|---|---|---|
| Model year | 2009 | 2009 |
| Price | — | — |
| Engine | 49 cc | 49 cc |
| Horsepower | 3 hp | — |
| Torque | 3 Nm | — |
| Seat height | 31 mm | — |
| Fuel capacity | 1.4 L | 1.1 L |
| Fuel type | petrol | petrol |
| Transmission | Automatic | — |
| Front brakes | Single disc | Single disc |
| Rear brakes | Expanding brake (drum brake) | Expanding brake (drum brake) |
| Tires | 120/70-12 / 130/70-12 | 120/90-10 / 130/90-10 |
Yamaha Neos 4S vs Hyosung SF 50B — which should you buy?
Picking between the Yamaha Neos 4S and the Hyosung SF 50B usually comes down to the numbers you care about most. On paper, the Yamaha Neos 4S brings 3 hp, while the Hyosung SF 50B 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:

