The fuel tank capacity of the Yamaha FZ S V3.0 FI is 13 liters (3.43 US gallons). This is a standard fuel tank capacity for motorcycles in the 150cc-250cc range, and provides a decent range for the FZ S V3.0 FI. The fuel tank is made of high-quality plastic and is designed to be durable and lightweight, providing good fuel storage without adding too much weight to the motorcycle. The fuel tank is also equipped with a fuel gauge, which allows the rider to easily monitor the fuel level and plan refueling stops accordingly. Overall, the 13-liter fuel tank capacity of the Yamaha FZ S V3.0 FI is sufficient for most riding conditions and provides a good balance of performance, efficiency, and convenience.