Most Fuel Injected (FI) motorcycles do not have a reserve tank because the fuel injection system itself provides a more accurate and efficient fuel management system compared to carbureted systems.
In traditional carbureted motorcycles, a reserve tank was necessary because the fuel delivery system relied on a float-operated valve within the carburetor to control the fuel flow. When the fuel level dropped to a certain point, the valve would open, allowing access to a small reserve of fuel to keep the engine running temporarily until the rider could refuel.
This electronic fuel management system is more precise and efficient, ensuring that the engine receives the appropriate amount of fuel at all times. As a result, there is no need for a reserve tank because the fuel consumption can be accurately monitored and managed by the fuel injection system.
While not having a reserve tank means riders need to be more mindful of their fuel levels and plan their refueling accordingly, the accuracy and reliability of the fuel injection system make the need for a reserve tank obsolete in most FI motorcycles.