Sinnis Jet II vs Yamaha Aerox 4 (2021)
Side-by-side spec comparison, pricing, and a plain-English breakdown of how the Sinnis Jet IIstacks up against the Yamaha Aerox 4. Numbers pulled from manufacturer spec sheets — click either bike for the full review.
Spec comparison
| Spec | Sinnis Jet II | Yamaha Aerox 4 |
|---|---|---|
| Model year | 2021 | 2021 |
| Price | — | — |
| Engine | 50 cc | 50 cc |
| Horsepower | 4 hp | 3 hp |
| Torque | — | 3 Nm |
| Weight | 135 kg | — |
| Seat height | 28 mm | 32 mm |
| Fuel capacity | — | 1.6 L |
| Fuel type | petrol | petrol |
| Transmission | Automatic | Automatic |
| Front brakes | Single disc. Hydraulic. | Single disc |
| Rear brakes | Expanding brake (drum brake) | Single disc |
| Tires | 3.50-10 / 3.50-10 | 120/70-13 / 130/60-13 |
Sinnis Jet II vs Yamaha Aerox 4 — which should you buy?
Picking between the Sinnis Jet II and the Yamaha Aerox 4 usually comes down to the numbers you care about most. On paper, the Sinnis Jet II brings 4 hp in a 135 kg package, while the Yamaha Aerox 4 counters with 3 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: