Start Your XR190 Right! The EASY Fuel Pump Priming Guide
Updated 14/08/25
Priming the fuel pump on a Honda XR190 is a simple, yet important, part of the starting process. The purpose of priming the fuel pump is to build up the correct pressure in the fuel lines, ensuring that the engine gets a steady and sufficient supply of fuel as soon as you hit the starter button. Let’s look at how easy this is.
Contents
General Priming Procedure
1. Insert the key and turn it to the “ON” position. Don’t press the starter button yet.
2. Listen for a humming or whining sound. This sound comes from the fuel tank and indicates that the electric fuel pump is running.
3. Wait for the sound to stop. The pump runs for a few seconds (usually 2-3 seconds) to pressurize the fuel system. Once it has reached the required pressure, it will automatically shut off, and the sound will stop.
4. Once the sound stops, you are ready to start the engine. Press the starter button and the engine should fire up without issue.
Important points
Don’t touch the throttle while starting the engine. The fuel injection system is designed to provide the correct fuel-air mixture on its own.
The priming process is a quick one. Waiting for the sound to stop is all you need to do to ensure the system is properly primed.
If you don’t hear the priming sound, it could indicate a problem with the fuel pump, the battery, or an electrical issue. In that case, check your fuses and make sure you have a fully charged battery.
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1. Why is it important to "prime the fuel pump" on a Honda XR190L before starting it?
Priming the fuel pump is a crucial step to ensure a smooth and easy start every time. The process builds up the correct pressure in the fuel lines, guaranteeing that the engine receives a steady and sufficient supply of fuel as soon as you hit the starter button.
If you don’t prime the engine, starting may be rough and difficult and you may also stall after driving away.
2. Is the Honda XR150L the same?
No, in Vietnam the Honda XR190L is a fuel injected bike, whereas the XR150L has a carburettor. This means that the 190 is easier to start and will likely have better performance and fuel economy. The 150 can be more difficult to start and you may need to use choke (link to video).
3. Should I touch the throttle while starting the engine?
No, you should not touch the throttle while starting the engine. The fuel injection system is designed to automatically provide the correct fuel-air mixture, so manipulating the throttle can disrupt this process and make the bike harder to start.
4. Is this priming process something I have to do every single time I start the bike?
Yes, it is a recommended best practice to do this every time you start the motorcycle, especially when it has been sitting for a while. It’s a quick and simple step that ensures the bike starts reliably and can help prevent potential issues with the fuel system over time.
5. I am not mechanically inclined. Is this priming process difficult to learn?
Not at all. The process is extremely simple and only takes a few seconds. Just remember these three steps: turn the key to “ON,” listen for the humming sound, wait for it to stop, and then press the starter button. It will quickly become second nature.
It is that Easy!
Mastering this simple Honda XR190L fuel pump priming step guarantees a smooth start for your Vietnam adventure. This quick, crucial process ensures your touring motorcycle is always ready to ride, no matter where your journey takes you.
