What Causes Low Fuel Pressure in a Motorcycle?

When a motorcycle has low fuel pressure, what could be the cause? A bad fuel filter? Or perhaps the fuel pump itself is the problem. 

Partzilla's motorcycle expert John Talley goes live on our YouTube channel every Friday at 3pm Eastern, and in this edition of live Q&A, he addresses what could be causing low fuel pressure in a motorcycle.

What causes low fuel pressure fuel pump

Low Fuel Pressure Causes

What’s your best guess for what causes low fuel pressure in a motorcycle? Fuel pump, fuel filter or something else?

John Talley: Most of the time it’s going to be fuel-pump related. The fuel filter? Yeah, sometimes, but nine times out of 10 it’s going to be the fuel pump itself that’s starting to lose a little bit of zip. But hey, fuel filters are a lot cheaper than a fuel pump, and if your fuel pump has that much time and mileage on it, go ahead and do the filter first and then go after the pump, unless it’s an integrated unit. 

Performing a pressure test is one of the best ways to figure out problems with a motorcycle's fuel pump. In the video below, John shows you how to do a fuel pump pressure test on a motorcycle.

Watch the video above to see how to do a fuel pump test on a Suzuki motorcycle

Buy motorcycle fuel pumps

Buy motorcycle fuel filters

Got a bad fuel pump on your motorcycle? In the video below, John shows you a couple of common issues with a fuel pump, as well as identifying the clogged fuel filter causing the fuel pump problems on a Suzuki motorcycle. See how to replace the fuel filter, then reassemble the fuel pump and install it back onto the machine.

Watch the video above to see how to repair the fuel pump of a Suzuki motorcycle.

What if your motorcycle's fuel pump won't prime? In the video below, John diagnoses why the fuel pump on a Suzuki motorcycle isn’t priming. He shows you how to check the fuel pump relay, if there's power going to the fuel pump, and removing the fuel pump to test the motor, replacing the entire fuel pump and getting it back on the machine.

Watch the video above to see how to troubleshoot fuel pump priming issues with a Suzuki motorcycle.

Want to see more live repair questions answered? See more motorcycle and ATV questions answered here.  



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