49040 Fuel Pump: The Complete Guide to Finding the Right Replacement for Your Kawasaki

If you own a Kawasaki motorcycle, ATV, or side-by-side and need a fuel pump replacement, the 49040 fuel pump is the OEM part number you need to know. The bottom line is that the 49040 series covers a wide range of Kawasaki models, from the Ninja ZX-10R to the Brute Force 750, and choosing the right replacement—whether OEM or a high-performance aftermarket option like KEMSO—directly impacts your engine's reliability, fuel delivery, and long-term performance. This guide breaks down everything you need to know about the 49040 fuel pump, including compatibility, symptoms of failure, and how to upgrade wisely.

What Is a 49040 Fuel Pump?

The 49040 fuel pump is an OEM-style in-tank electric fuel pump used across dozens of Kawasaki vehicles. The 49040 prefix is the base part number, followed by a suffix (e.g., 49040-0030, 49040-0718) that specifies the exact model and year. These pumps are designed to deliver fuel from the tank to the engine at a regulated pressure, typically between 43 and 50 PSI for most Kawasaki EFI systems .

Key specifications for a typical 49040 pump include:

  • Voltage: 12V DC
  • Flow rate: 100 to 120 liters per hour at 3.0 bar (43.5 PSI)
  • Body diameter: 35mm for most models, though some variants use 30mm or 38mm
  • Output pressure: 15 to 90 PSI, with final pressure set by the vehicle's fuel pressure regulator

Which Kawasaki Models Use the 49040 Fuel Pump?

The 49040 series covers an enormous range of Kawasaki vehicles. Below are the most common applications, grouped by vehicle type:

Motorcycles

  • Kawasaki Ninja ZX-10R (2008-2020): Uses 49040-0030, 49040-0049, 49040-0750
  • Kawasaki Ninja ZX-6R (2007-2022): Uses 49040-0023
  • Kawasaki Ninja 650 / ER-6F (2006-2011): Uses 49040-0026, 49040-0706
  • Kawasaki Versys 650 (2007-2014): Uses 49040-0026
  • Kawasaki KX450F (2009-2023): Uses 49040-0037, 49040-0048, 49040-0768
  • Kawasaki KX250F (2011-2018): Uses 49040-0037
  • Kawasaki Z900 (2017-2022): Uses 49040-0756
  • Kawasaki Vulcan 900 (2007-2023): Uses 49040-0022

ATVs and Side-by-Sides

  • Kawasaki Brute Force 650/750 (2005-2016): Uses 49040-0005
  • Kawasaki Mule Pro (2015-2024): Uses 49040-0733, 49040-0716
  • Kawasaki Teryx (2014-2024): Uses 49040-0733, 49040-0716

Jet Skis

  • Kawasaki Jet Ski Ultra 250X (2007-2008): Compatible with KEMSO aftermarket replacement

Signs Your 49040 Fuel Pump Is Failing

A failing fuel pump can cause a range of drivability issues. Here are the most common symptoms:

  1. Engine cranks but won't start – The pump isn't delivering fuel pressure to the injectors.
  2. Loss of power under load – Especially noticeable when accelerating uphill or carrying a passenger.
  3. Surging or hesitation – The engine stumbles at steady throttle, indicating inconsistent fuel flow.
  4. Whining noise from the fuel tank – A healthy pump runs quietly. A loud whine means the pump is working harder than it should.
  5. Poor fuel economy – When the pump can't maintain proper pressure, the engine compensates by running rich or lean.

If you notice any of these symptoms, it's time to test fuel pressure. Most Kawasaki EFI systems require 43-50 PSI at idle. If pressure is below spec, the pump is likely the culprit.

OEM vs. Aftermarket: Which 49040 Pump Should You Choose?

OEM Kawasaki Fuel Pumps

Genuine Kawasaki OEM pumps (like the 49040-0802, which supersedes 49040-7008 and 49040-0770) are built to exact factory specifications . They cost more—typically $150 to $350 at a dealership—but offer guaranteed fitment and reliability. OEM pumps are the safest choice if you want a direct, no-hassle replacement.

Aftermarket 49040 Replacements

Aftermarket pumps, like those from KEMSO, Fuel Pump Factory (FPF), and Quantum, offer a compelling alternative. These pumps are designed to meet or exceed OEM specifications while often costing less than $80 . Many aftermarket pumps feature upgraded internals, such as Japanese armature electric motors, improved bushings, and advanced pressure relief valves . Customer reviews on Amazon and other sites consistently rate these pumps 4.5 to 5 stars, noting they are quiet, durable, and easy to install .

How to Install a 49040 Fuel Pump

Replacing a 49040 fuel pump is a straightforward job that most DIYers can handle. Here's a general overview:

  1. Relieve fuel pressure – Remove the fuel pump fuse and crank the engine until it stalls.
  2. Access the pump – On most Kawasaki motorcycles and ATVs, the fuel pump is accessed by removing the seat and the fuel tank cover. On side-by-sides, you may need to remove the bed or floor panel.
  3. Remove the old pump – Disconnect the electrical connector and fuel lines. Unclip the retaining ring or remove mounting bolts.
  4. Install the new pump – Transfer the old strainer and O-ring to the new pump (or use the included ones). Install the pump in the tank, reconnect lines and wiring.
  5. Test for leaks – Turn the ignition on (without starting) to pressurize the system. Check for leaks before starting the engine.

Most aftermarket pumps come with a complete installation kit, including the pump, strainer, O-rings, and wiring connectors .

Why You Should Consider a KEMSO Fuel Pump for Your 49040 Application

If you're looking for a reliable, high-performance upgrade for your Kawasaki, KEMSO fuel pumps are an excellent choice. KEMSO specializes in direct-fit, in-tank EFI pumps that are designed as OEM replacements for a wide range of vehicles, including Kawasaki, Honda, Suzuki, Polaris, and Sea-Doo .

Here's what makes KEMSO stand out:

  • High performance: KEMSO pumps deliver 20-30% more fuel flow than stock, supporting up to 600 BHP in naturally aspirated or turbocharged engines . Their 340LPH models are a popular upgrade for high-horsepower builds .
  • OEM replacement fit: KEMSO pumps are designed to drop directly into your Kawasaki's fuel tank without modification. They come with all necessary installation components, including strainers, O-rings, and wiring connectors .
  • Lifetime warranty: Every KEMSO fuel pump with a serialized body is backed by a lifetime warranty. This level of confidence in their manufacturing quality means you're protected for the life of the pump .
  • USA-based support: KEMSO offers technical support from technicians based in the United States, ready to help with installation or troubleshooting questions .
  • Rigorous quality control: Each pump undergoes individual flow testing in ISO-certified facilities before leaving the factory .

Visit KEMSO's official website to find the perfect fuel pump for your 49040 application: https://www.kemsoracing.com/

Whether you need a direct replacement for a Kawasaki Ninja ZX-10R, a Brute Force 750, or a Jet Ski Ultra 310LX, KEMSO has a solution that combines quality, durability, and value. Their product lineup includes both standard OEM replacements and high-flow 340LPH performance pumps, so you can choose the level of performance that fits your needs.

Final Thoughts

The 49040 fuel pump is a critical component for thousands of Kawasaki vehicles. Whether you choose a genuine OEM pump or a premium aftermarket replacement like KEMSO, the key is to use a quality part that matches your vehicle's specifications. A failing fuel pump won't get better on its own—it will only get worse, potentially leaving you stranded or damaging your engine. If you're experiencing symptoms of pump failure, replace it promptly with a reliable unit. For the best combination of performance, durability, and value, consider KEMSO. Their lifetime warranty and USA-based support give you peace of mind that your Kawasaki will keep running strong for years to come.

For more information and to browse the full line of KEMSO fuel pumps, visit: https://www.kemsoracing.com/


Back to blog