All Balls 47-2037 Yamaha YZ250F YZ450F YFZ450R YFZ450X Fuel Pump Rebuild Kit — Restore Fuel Pressure

All Balls — Restoring Lost Fuel Pressure, Stop Struggling with Engine Flame-Outs

Is your Yamaha YZ250F or Yamaha YFZ450R bogging under load, or are you experiencing frustrating flame-outs in tight corners? Over time, fuel filters clog and pump motors lose the ability to maintain the high pressure required for modern fuel injection. Instead of spending hundreds on a complete housing, this All Balls Fuel Pump Rebuild Kit provides a precision-engineered solution to restore the consistent fuel delivery your engine demands for peak performance.

This Factory Quality kit is designed for a seamless plug-and-play installation, including the pump, filter, and all necessary hoses and clamps required for your specific Yamaha model. Whether you are racing a motocross moto on a Yamaha YZ450F or navigating technical trails on a Yamaha YFZ450X, this rebuild kit ensures your EFI system receives a steady, debris-free flow of fuel to prevent lean conditions and overheating.

• Complete Restore Solution: Includes pump, filter, wiring harness, and clamps to fully refresh the fuel module.
• Economical Performance: Restores Factory Quality fuel pressure without the high cost of an entire assembly.
• Direct Fit Engineering: Designed specifically for Yamaha EFI tanks for a "no-hassle" drop-in installation.
• Eliminate Engine Hesitation: Clears up low-end bogs and high-RPM leaning caused by a failing pump motor.
• High-Efficiency Filtration: Features a fresh internal filter to protect your fuel injector from tank debris.

Moto-House MX Pro Tip:

When rebuilding the fuel pump module on your Yamaha YZ450F or Yamaha YFZ450R, ensure the tank is completely free of sediment before re-installing the unit. Even a tiny amount of grit can prematurely clog your new filter or damage the pump internals. Also, apply a light coat of fuel-safe grease to the main tank O-ring to ensure a perfect seal and prevent leaks.

Year Range	Make	Model
2014 - 2024	Yamaha	YZ250F
2010 - 2022	Yamaha	YZ450F
2009 - 2025	Yamaha	YFZ450R
2010 - 2011	Yamaha	YFZ450X
2015 - 2019	Yamaha	YZ250FX / WR250F
2016 - 2018	Yamaha	YZ450FX
2012 - 2019	Yamaha	WR450F
2008 - 2020	Yamaha	WR250R / WR250X

Frequently Asked Questions

Does this kit replace the entire fuel pump housing?

No, this kit is designed to rebuild your existing module. It includes the Factory Quality internal pump motor and filter components, allowing you to reuse the plastic housing which rarely fails, saving you significant money.

Will this help my Yamaha YFZ450R start easier?

Absolutely. If your Yamaha YFZ450R is difficult to start, it is often due to low fuel pressure. This kit restores the pump's ability to prime the system quickly for faster starts.

How often should I rebuild my fuel pump?

For high-performance motocross or racing use on machines like the Yamaha YZ250F or Yamaha YFZ450R, we recommend inspecting the filter every 50 hours. If you notice any loss in top-end power or throttle response, a full rebuild is advised.

Moto-House MX – Choice of Champions – is located in Clermont/Montverde, FL. We are the best motocross shop in Central Florida with lightning-fast shipping.