Yamaha FZ-S Fi vs Fosti F51 (2023)
Side-by-side spec comparison, pricing, and a plain-English breakdown of how the Yamaha FZ-S Fistacks up against the Fosti F51. Numbers pulled from manufacturer spec sheets — click either bike for the full review.
Spec comparison
| Spec | Yamaha FZ-S Fi | Fosti F51 |
|---|---|---|
| Model year | 2023 | 2021 |
| Price | — | — |
| Engine | 149 cc | 149 cc |
| Horsepower | 12 hp | 12 hp |
| Torque | 13 Nm | 9 Nm |
| Weight | — | 115 kg |
| Seat height | 31 mm | — |
| Fuel capacity | 3.4 L | 4.0 L |
| Fuel type | petrol | petrol |
| Transmission | 5-speed | — |
| Front brakes | Single disc. ABS | Single disc |
| Rear brakes | Expanding brake (drum brake). ABS | Expanding brake (drum brake) |
| Tires | 100/80-17 / 140/60-17 | 90/90-17 / 110/80-17 |
Yamaha FZ-S Fi vs Fosti F51 — which should you buy?
Picking between the Yamaha FZ-S Fi and the Fosti F51 usually comes down to the numbers you care about most. On paper, the Yamaha FZ-S Fi brings 12 hp, while the Fosti F51 counters with 12 hp at 115 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: