Fosti F51 vs Yamaha FZ-S Fi (2023)
Side-by-side spec comparison, pricing, and a plain-English breakdown of how the Fosti F51stacks up against the Yamaha FZ-S Fi. Numbers pulled from manufacturer spec sheets — click either bike for the full review.
Spec comparison
| Spec | Fosti F51 | Yamaha FZ-S Fi |
|---|---|---|
| Model year | 2021 | 2023 |
| Price | — | — |
| Engine | 149 cc | 149 cc |
| Horsepower | 12 hp | 12 hp |
| Torque | 9 Nm | 13 Nm |
| Weight | 115 kg | — |
| Seat height | — | 31 mm |
| Fuel capacity | 4.0 L | 3.4 L |
| Fuel type | petrol | petrol |
| Transmission | — | 5-speed |
| Front brakes | Single disc | Single disc. ABS |
| Rear brakes | Expanding brake (drum brake) | Expanding brake (drum brake). ABS |
| Tires | 90/90-17 / 110/80-17 | 100/80-17 / 140/60-17 |
Fosti F51 vs Yamaha FZ-S Fi — which should you buy?
Picking between the Fosti F51 and the Yamaha FZ-S Fi usually comes down to the numbers you care about most. On paper, the Fosti F51 brings 12 hp in a 115 kg package, while the Yamaha FZ-S Fi counters with 12 hp.
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: