Top 5 Tips to Diagnose Motorcycle, ATV & UTV Fuel Pump Problems

If your machine is running roughly or not running at all, there is a good chance that a fuel pressure issue is the culprit. Although fuel pump problems are common, diagnosing exactly what the issue is can be a tricky task with so many other components coming into play. In this video, Charles shares his top 5 tips to diagnose fuel pump problems on motorcycles, ATVs, and UTVs.

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Chapters:

0:00 - Intro
1:12 - Fuel Pump Doesn't Cycle
2:44 - Holds Pressure With Key On
3:29 - Check Fuel Pressure Under Acceleration
3:56 - Low Pressure Causes Lean Condition
4:26 - Service Fuel Filters
5:49 - Bonus Tip 1: Heat Kills Fuel Pumps
6:01 - Bonus Tip 2: Pre-Filter Your Fuel
6:12 - Bonus Tip 3: Use Fuel Stabilizer

[xzouix]

Charles, you're the best! Very well explained, and it is obvious that having a motorcycle manual is necessary "tool" to have around.

[pdloder]

My yfm700 grizzly gets power to the pump when during cycling when key is first turned on; but not when winding over starter motor. Any ideas?

[DirtyDovi]

Interesting timing, I just replaced the fuel injection pump-motor on my WR250R Yesterday.
The bike is basicly Brand New - sat for 1 winter, and the OEM pump crapped out..
Anyways.. Now w/ the new setup in, and 4.7 gal tank Topped Off,
the 'low-fuel-LED-light" has come on and won't stop blinking.
[No one seems to be able to provide a straight answer for fixing it either]
If anyone has any advise/ideas - They'd be very much appreciated!

[willard]

Fuel pump wont cycle my wire diagram doesnt tell me what wire is the ground and power ? Cf moto z force 500

[wisdomandthewoods]

My fuel pump only primes when the engine is cool. Once it’s warmed up and you turn the key on there is no fuel pump prime and no start until it’s cooled back down.