How to Use the Fuel Tank Switch on a 125cc Motorcycle?
3 Answers
The main fuel tank on a motorcycle's fuel tank switch is indicated by the letter ON or a full cup icon, while the reserve tank is indicated by the letter RES or a half-cup icon. OFF means closed. There is an arrow on the fuel tank switch handle. Move the handle so that the arrow points to the desired symbol to select the corresponding function.
Regarding the use of the fuel tank switch on a 125cc motorcycle, I remember being confused when I first started riding in my younger days. The fuel tank switch is usually located under the tank and is a small valve, commonly available in manual and automatic types. Manual switches typically have three positions: ON, OFF, and RESERVE. Remember to turn it to OFF when parking to prevent fuel evaporation and waste; while riding, switch it to ON to allow fuel to flow to the carburetor. My advice is not to rush at first—locate its position, which is often on the lower left side of the tank and easy to reach. Always check the switch position before refueling. Fueling is faster when it’s ON, but avoid overfilling to prevent spills. Make it a habit to turn it OFF when parking to avoid fuel line blockages or accidental leaks, which also benefits engine protection. Over the years, I’ve seen many beginners forget to turn it OFF, leading to starting difficulties, so practice feeling for it often, and the operation will become second nature.
Using the fuel tank switch on a 125cc motorcycle is actually quite simple, something I learned as a beginner. The switch is usually located near the bottom of the fuel tank, and operating it involves just two actions: turn it to ON before starting to allow fuel to flow smoothly into the engine; turn it back to OFF after parking to prevent fuel leakage or evaporation. For manual types, a gentle twist is sufficient—avoid using excessive force to prevent damaging the valve. I recommend beginners practice a few times in an open area, such as checking fuel flow through the hose after refueling. My tip is to always carry a cloth with you—avoid touching the switch with wet hands to prevent slipping. Maintenance is also crucial; occasionally lubricate the switch with oil to ensure it doesn’t get stuck. Overall, mastering this routine makes riding safer and more worry-free.
