How To Check Fuel Pump On Harley Davidson

Maintaining a Harley Davidson is an important and rewarding task. The engine requires regular inspections and maintenance to ensure that it is running at its best.

One of the key components in any motorcycle’s engine system is the fuel pump, responsible for ensuring that gasoline enters the carburetor or injection system when needed.

How To Check Fuel Pump On Harley Davidson

Knowing how to check your fuel pump on a Harley Davidson can help keep you safe while riding. But what should one look out for? What tools will be necessary?

Read on to find out exactly how to check your fuel pump on a Harley Davidson with ease and confidence!

Tools And Supplies Needed

Irony may be the last thing one would expect when it comes to maintenance of a Harley Davidson. But, believe it or not, knowing how to check fuel pump on a Harley is essential for keeping your ride in top condition.

For such an important task, you need the right tools and supplies.

A wrench set and socket set are necessary to remove any existing plumbing connections prior to accessing the fuel pump.

It’s also recommended that you have a multimeter handy so that you can test circuits while working with wiring components.

You will want to ensure all electrical parts are connected properly before putting them back together.

Additionally, having some extra fuel line clamps on hand is always a good idea; they come in handy if any of the old lines get damaged during removal or installation.

Preparing Your Harley Davidson For Fuel Pump Inspection

Preparing your Harley Davidson for fuel pump inspection requires some pre-inspection preparation. Prior to the process, several tools and supplies must be gathered and readied.

To begin, it is essential to acquire any needed parts or components necessary to carry out a successful evaluation of the fuel pump.

Additionally, ensure that you have all necessary safety equipment such as glasses and gloves handy in order to protect yourself during the procedure.

Once these items are acquired and ready, an area with adequate space should be cleared so as to allow full access to the bike’s fuel system.

Moreover, documentation regarding model type and corresponding fuel systems will prove valuable when troubleshooting and diagnosing any potential issues discovered while examining the pump.

It can also help determine if any aftermarket products have been installed on the motorcycle which may require additional attention or maintenance prior to proceeding with further repairs or replacements of faulty parts.

Finally, having a basic understanding of how the motorbike’s fuel system works is beneficial knowledge when attempting repairs but it is not necessarily required before beginning examination of the fuel pump itself.

Locating The Fuel Pump

As the saying goes, ‘you can’t fix what you can’t find’. Locating the fuel pump on a Harley Davidson is key to being able to inspect it. Knowing where and how to locate the fuel pump will help ensure that any inspection process of the part runs smoothly.

The first step in locating the fuel pump is determining its exact position within the motorcycle’s engine compartment.

It will be located near other components such as spark plugs and carburetor lines, so identifying those parts will help narrow down the search area.

Once this has been established, take off all necessary tank covers or fairings needed to access the fuel pump.

Then proceed to carefully remove any brackets connected to the frame and finally use an appropriate wrench to unscrew bolts if they are present.

At this point, you should have full access to view and inspect your Harley Davidson’s fuel pump for any issues or signs of wear and tear.

It is important that one takes time when inspecting their Harley Davidson due diligence must be taken when doing maintenance work; otherwise, potential damage could occur which may cost more money than expected in repairs.

Taking care of your bike not only helps prevent costly repairs but also makes sure you get maximum performance out of it when riding.

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When dealing with Harley Davidson, testing the fuel pump is a necessary part of assessing its functionality. There are numerous tests that can be conducted in order to pinpoint any issues or faults within the system. It is important to understand what these tests entail and how they work when it comes to diagnosing problems related to the fuel pump on a Harley Davidson.

The first test involves checking for power at the ignition switch. This requires accessing the wiring harness and locating the two terminals connected to the main fuse panel.

If there is no power present then this could indicate an issue with either the switch itself or one of its associated components such as a relay or fusible link.

Additionally, if there is power present but doesn’t seem adequate enough, then further investigation should be done by using an ohmmeter or multimeter which will measure current draw from each component and help diagnose any potential short circuit issues.

Another method would involve running continuity checks between key points of voltage throughout the system, including measuring resistance values along various connections in order to verify their integrity.

For example, if a connection shows signs of corrosion or loose contacts then this could potentially cause intermittent operation of the fuel pump due to electrical interference or poor contact surfaces.

Ultimately, all tests need to be performed in order to accurately determine any underlying issues before replacing parts unnecessarily.


The task of disconnecting the fuel pump on a Harley Davidson can be likened to untangling a knot. At times, it may appear difficult and laborious; however, with patience and persistence, one can successfully accomplish this goal.

Firstly, all power sources from the motorcycle should be disconnected. This includes turning off the ignition switch and removing the battery cable for safety purposes.

Once these steps are complete, unscrew the bolts that secure the fuel line to the tank so that it can be removed without any obstruction.

Afterward, carefully disengage the wiring harness from its port in order to have access to remove two screws that hold down the fuel pump assembly.

Detach them both before taking out the entire unit entirely with caution as not to damage other parts or components of your Harley Davidson bike.

Finally, put everything back together once you finish checking up on your fuel pump.

By following these simple instructions, anyone is able to check their fuel pump on a Harley Davidson safely and effectively.


Cleaning the fuel pump of a Harley Davidson is no simple task. It requires careful attention and patience to ensure that it’s done correctly. Comparing this process to an oil change, one could liken it to taking apart a puzzle; every piece must be carefully removed in order for the cleanup job to be successful.

The first step involves disconnecting all the necessary parts from the motorcycle before beginning any cleaning. Then, each component should be cleaned with a soft brush or cloth soaked in warm soapy water. Once rinsed off, they can then be dried thoroughly with compressed air or a clean rag before being reassembled back into place. The final part of the cleaning procedure entails applying lubricant on the springs inside the fuel pump assembly and ensuring that all connections are securely tightened before moving onto testing its functionality.

A thorough inspection should follow after completing these steps as even minor errors may lead to malfunctions in performance down the line. Proper maintenance of your vehicle will help keep you safe while enjoying your ride!


To inspect the fuel pump on a Harley Davidson, it is akin to taking an eagle’s watchful eye to find any problems. Paying attention to detail and having knowledge of how the motorcycle works are key components in this process. It begins with turning off all power sources that could interfere. Taking note of visible elements such as hoses or connections for signs of wear can be done prior to disassembly if needed.

Once apart, one should look at parts like seals, gaskets, O-rings and other components for damage from age or use. If anything looks amiss, replace them immediately before reassembling everything back together.

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Checking electrical contacts for corrosion and ensuring the lines are connected properly helps guarantee proper functioning when finished.

Lastly, make sure all fasteners are tight and secure after completion so there aren’t any unwanted surprises down the road due to loosening during vibration while driving.

Having a well maintained fuel pump will ensure optimal performance of your Harley Davidson motorcycle far into the future.


Replacing a fuel pump on a Harley Davidson requires one to take an extraordinary journey into the bowels of their motorcycle. The task is complicated, but with some patience and proper tools it can be achieved.

First, the fuel tank must be removed from the motorcycle. This involves disconnecting electrical connections such as wires and cables, undoing mounting screws or bolts, then carefully lifting off the entire assembly. After this step is completed successfully, the next step will involve loosening and removing all necessary components that cover the fuel pump area in order to gain access to it. Once exposed, use caution when working around any gasoline related parts which could create a hazardous situation if not handled properly.

After gaining full access to the fuel pump itself, unscrew each part connected to it until it’s free of its mountings; then pull out the old unit and discard safely. Insert new replacement unit back in place by connecting hoses, tightening clamps and screwing down screws securely ensuring no leaks occur when testing for correct operation after installation is complete.


Resetting a fuel pump on a Harley Davidson is an important step in ensuring that the motorcycle runs efficiently. It can allow for the bike to run smoothly and with consistent power, while also reducing the risk of engine damage due to misfires or poor fuel distribution. Therefore, it is essential to understand how to properly reset the fuel pump before attempting any work on a Harley Davidson motorbike.

The process of resetting a fuel pump on a Harley Davidson involves disconnecting all electrical connections from the pump as well as removing any bolts holding it into place. Once these have been removed, it is then necessary to check for any blockages in the lines connecting the fuel tank and filter assembly.

If there are no obstructions present, then one should proceed by attaching a new wiring harness or other appropriate connection type between the pump and its corresponding wires or plugs.

Finally, after everything has been connected correctly, then one must test that the system works correctly by turning on the ignition switch and testing whether there is adequate pressure coming through when revving up the engine. If this proves successful, then one may consider themselves ready to go out onto their next ride!

Troubleshooting Common Issues

Roughly 80% of all Harley Davidson motorcycles experience fuel pump issues at some point in their lifetime, according to a recent survey. Troubleshooting common issues can help motorcyclists identify and address concerns with the fuel pump quickly and efficiently.

The first step when troubleshooting any issue is to ensure that there are no loose connections or clogged filters. Inspecting the hoses for cracks, tears, or other signs of wear will also be beneficial as it could indicate an impending failure. If everything appears to be normal, then running a diagnostic test on the system may reveal more information about the underlying cause of the problem. Additionally, checking for any error codes stored in the bike’s computer can provide insight into what needs to be fixed.

Motorcycle owners should always use caution when attempting repairs themselves and consult experienced professionals if necessary. Taking preventative measures such as regularly inspecting hoses and replacing worn components promptly can go a long way towards preventing future problems down the road.

Tips For Maximizing Fuel Pump Performance

The maintenance of a fuel pump is important for the optimal performance of Harley Davidson motorcycles. Regularly checking and replacing the fuel pump helps to prevent issues related to power loss, engine misfires, or stalling out. This article will provide tips on how to maximize fuel pump performance in order to best ensure a smooth ride on your Harley Davidson.

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Firstly, it is recommended that you use only high-quality parts when making repairs or replacements to any part of the bike, including the fuel pump. Additionally, make sure that all connections are secure and clean before using them; this includes connectors at both ends of the wiring harnesses as well as where they attach to other components within the system. In addition, be sure not to overfill the tank with gasoline which can cause pressure buildup in the lines that lead from the tank to the carburetor. It’s also suggested that you test fuel flow regularly by running an external line directly into the carburetor while revving up your motorcycle’s engine.

Another way to optimize fuel pump performance is by maintaining proper air intake levels throughout operation. If there isn’t enough air coming into the cylinder chambers then it could result in insufficient atomization of gas particles leading to decreased combustion efficiency and reduced overall performance. Finally, check your spark plugs periodically for signs of wear or fouling due to carbon deposits—this may indicate a need for further inspection and/or adjustment of certain components such as valves or pistons in order to avoid damaging your engine over time.

Potential Warning Signs Of A Failing Fuel Pump

The fuel pump is an essential component of a Harley Davidson motorcycle’s engine, as it helps to supply the fuel needed for combustion. When functioning properly, it ensures continuous and efficient operation of the motorbike. However, when there are issues with this part, certain warning signs may be present.

One sign that could indicate trouble with the fuel pump is difficulty starting the vehicle or stalling during idle periods. Additionally, if performance decreases while riding, such as not being able to accelerate quickly enough or reduced power output at higher speeds, then this could be another symptom of a failing fuel pump. Other potential indications include inconsistent pressure in the carburetor and a loud whining noise coming from under the seat while running the bike.

If any of these symptoms occur on a regular basis, it is recommended to check your Harley Davidson’s fuel pump right away before more serious damage arises. A qualified technician should be consulted for further diagnosis and repairs as necessary.

Cost Considerations For Fuel Pump Replacement

The fuel pump is an essential component of a Harley Davidson motorcycle, provided the necessary pressure to feed gasoline into the engine. Figuratively speaking, it can be likened to the beating heart that powers these iconic American machines. Understandably so, replacing this part should not be taken lightly and cost considerations need to be factored in.

Firstly, one must consider if there are any aftermarket options available for their particular model as they may offer better value compared to original equipment manufacturer parts. In addition, labor costs associated with installing a new fuel pump will have to be considered depending on whether the work is done by an experienced mechanic or if you wish to tackle the task yourself. Finally, availability of components needed such as gaskets and hoses might also add up to your total repair bill.

All things considered, replacing a fuel pump requires careful research and planning due to its importance and potential financial implications involved. It would thus be prudent for owners of Harley Davidsons motorcycles to take all aspects into account when deciding how best proceed with repairs or maintenance required for this vital piece of machinery.


In conclusion, ensuring that your Harley Davidson’s fuel pump is in good working order will help to maintain the power and longevity of your motorcycle. Therefore, it is important to check the fuel pump regularly for any issues or signs of wear and tear.

It is also essential to be aware of potential warning signs such as a hard start, engine misfiring, or sputtering which can indicate an issue with the fuel system. Additionally, if you notice any changes in performance from your bike, make sure to inspect your fuel pump immediately as replacing this part sooner rather than later can save time and money down the line.

To ensure optimal performance from your Harley Davidson’s fuel system, take proactive steps such as using high-quality gasoline and taking extra care when disconnecting components during maintenance.

As they say “an ounce of prevention is worth a pound of cure” – so keep up regular inspections on your Harley Davidson’s fuel pump and enjoy many successful miles ahead!

By Jacob - The Rider

Hi, my name is Jacob. I'm the founder of Backyard Rider Mag - a blog about motorcycles. I've studied engineering in college but decided to make blogging my career because it really aligned with what I wanted to do creatively - talk about bikes! I've been riding for 16 years now- everything from sportbikes to cruisers, dirtbikes or even dual sports. And after all these years on the road, there are still new bikes that excite me just as much as when I first started riding.

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