The fuel reserve in a motorcycle is a feature designed to provide a warning to the rider when the main fuel supply is running low. It allows the rider to switch to a limited amount of fuel stored separately in the reserve section of the fuel tank. Here's how the fuel reserve typically works in motorcycles:
Fuel Tank Design: Most motorcycles have a fuel tank with two compartments—the main section and the reserve section. The reserve section is typically smaller in size and located below or behind the main section. The switch or valve to access the reserve fuel is usually located near the fuel tank, either on the handlebars or the side of the tank.
Fuel Level Sensor: Inside the fuel tank, there is a fuel level sensor, which is usually a float attached to a sensor mechanism. This sensor detects the position of the float, which rises and falls with the fuel level.
Warning Indicator: The fuel level sensor is connected to a warning indicator on the motorcycle's instrument panel. When the fuel level drops below a certain point, the float in the tank triggers the sensor, and the warning light or fuel gauge on the instrument cluster illuminates or indicates a low fuel level.
Switching to Reserve: When the low fuel warning is activated, the rider can manually switch to the reserve fuel supply. The switch or valve is turned or flipped to redirect the fuel flow from the main section of the tank to the reserve section.
Limited Fuel Supply: The reserve section of the fuel tank contains a smaller amount of fuel compared to the main section. It allows the rider to travel a shorter distance to find a fuel station or reach their destination safely. It's important to note that the reserve fuel is not intended for continuous or prolonged use but serves as a temporary solution to avoid running out of fuel.
Refilling and Restoring: Once the rider switches to the reserve fuel, it's crucial to refill the tank as soon as possible to replenish the main section. This ensures that the reserve supply is available for future use if needed.
It's worth mentioning that not all motorcycles have a separate fuel reserve. Some modern motorcycles have fuel injection systems and electronic fuel management that provide more accurate fuel level readings and eliminate the need for a manual reserve switch. In such cases, the rider relies on the fuel gauge or low fuel warning light to monitor the remaining fuel and refuel in a timely manner.