Understanding the Differences Between Fuel 'On' and 'Reserve' in Motorcycles
Motorcyclists often encounter terms like fuel on and reserve when it comes to their bike's fuel system. These terms are particularly relevant for motorcycles equipped with a fuel petcock, a control valve that regulates the flow of fuel from the fuel tank to the carburetors. Let's delve into what these terms mean and how they impact your ride.
What is Fuel 'On'?
Fuel On is the standard operational mode for the fuel petcock. In this position, the fuel is allowed to flow freely from the fuel tank to the engine, ensuring that the vehicle can run smoothly and efficiently.
Usage: You would use fuel on when the fuel level in the tank is sufficient, typically above the reserve level. This is the default setting for daily riding and general use.
What is Fuel 'Reserve'?
Fuel Reserve is a secondary setting that allows the rider to access a smaller, more critical volume of fuel stored at the bottom of the fuel tank. This reserve fuel is designed to be used when the primary fuel supply is nearly depleted, providing a last-minute lifeline to avoid a sudden power loss.
Usage: The reserve position becomes useful when the fuel gauge indicates low fuel. Switching to the reserve position gives you a few more miles of riding before you would have to refuel. This is particularly useful in emergency situations when you're running critically low on fuel.
Key Differences in Fuel Access and Purpose
Fuel Access: The main difference between fuel on and reserve lies in the volume of fuel that each setting allows access to. Fuel on typically facilitates access to a larger volume of fuel, whereas reserve is intended to provide a smaller, emergency-only supply.
Purpose: The reserve setting is a crucial feature that helps prevent a complete loss of power due to running out of fuel. It acts as a reserve to keep you running long enough to reach a gas station or, in some cases, to coast into a safe area for a refill.
Modern Motorcycle Fuel Systems
It's important to note that not all modern motorcycles have a manual fuel petcock. Many contemporary motorcycles are equipped with automatic fuel injection systems that do not require manual controls for fuel flow. However, always consult your motorcycle's user manual for specific instructions regarding fuel settings.
Common Practices and Misconceptions
Some riders may have misconceptions about how the fuel reserve works. For instance, a producer might specify a 13-liter tank capacity as a combined figure, indicating that the actual usable capacity might be 10-11 liters, with 2-3 liters reserved for emergencies.
For carbureted bikes, a knob or switch labeled with 'on' and 'reserve' settings can help riders manage fuel efficiently. Typically, you should turn the switch to 'on' when the fuel gauge shows there's more than enough fuel in the tank, and to 'reserve' when the fuel is low and you need to access the emergency reserve.
Conclusion
Proper understanding and utilization of the fuel on and reserve settings can significantly enhance your riding experience, ensuring safety and avoiding potential breakdowns. Always refer to your motorcycle's user manual for specific instructions and advice tailored to your model.