107 Harley Engine Problems and Ways to Avoid Them

In this article, we'll detail the most common issues with the Harley 107 engine based on the reviews and reports from owners and mechanics, as well as what you can do to avoid them.

Let's get started!

Symptoms, Causes, and Solutions to the Most Common 107 Harley Engine Problems

This section contains a compilation of the most common engine problems encountered by Harley 107 owners. We have included here the signs that you should watch out for, the possible causes of the issue for your quick diagnosis, and possible solutions you can do to address each problem.

1. Excessive Engine Vibration

Many Harley owners report that their bikes produce excessive engine vibration, particularly at higher speeds. This can be caused by a number of factors, including engine imbalance, loose motor mounts, and a defective harmonic balancer.

Here's a quick guide to fixing the issue:

• If your engine is imbalanced, it will vibrate more at higher speeds. You can fix this issue by rebalancing the engine in accordance with Harley's recommended configuration.
• If your motor mounts are loose, they will allow the engine to move around more, which will cause vibrations. You can fix this issue by tightening the motor mounts.
• If your harmonic balancer is defective, it will cause the engine to vibrate. You can replace the harmonic balancer to fix this issue.

2. Oil Leaks

Another common issue with Harley 107 engines is oil leaks. These can occur for a variety of reasons, including worn or damaged seals and gaskets, or a faulty oil cooler.

Here's a quick guide to fixing the problem yourself:

• Start by checking the oil level in the engine. If it's low, top it off and see if the leak stops.
• If the oil level is fine, then the next step is to inspect all of the seals and gaskets for wear or damage. Replace any damaged components.
• If the seals and gaskets look good, then the next step is to check the oil cooler for leaks. This is usually the culprit if all else has been ruled out.
• If you find a leak in the oil cooler, then you'll need to replace it.
• Once you've replaced the oil cooler, check all of the seals and gaskets again to make sure they're properly seated and there are no leaks.
• Finally, start the engine and check for leaks again. If all is well, then you're good to go!

3. Cooling System Problems

Many Harley owners have also reported cooling system issues, such as overheating or radiator leaks. If you are experiencing these, it's likely that there's a build-up of sediment in the radiator. This can be caused by a number of factors, including engine coolant breakdown and improper maintenance.

Fortunately, it's relatively easy to fix the problem yourself. Here's a quick guide:

• Begin flushing the radiator. This will remove any sediment that's built up over time.
• If flushing the radiator does not work to remove sediment build-up, you may need to take more drastic measures. One option is to remove the radiator and clean it out from the inside. This can be a difficult and time-consuming task.
• Another option is to use a chemical radiator cleaner to break down the sediment and sludge that have built up on the radiator walls, making them easier to flush out. Be sure to follow the instructions on the cleaner carefully as some are more potent than others and can damage your radiator if used improperly.
• Next, check the water pump. If it's not working properly, it could be causing the overheating issue. Have it replaced if it's already damaged.
• Lastly, make sure the radiator cap is tight and in good condition. Replace it if necessary. A loose or damaged cap can cause coolant to leak, which can lead to overheating.

4. Engine Knocking

Another common complaint among Harley 107 owners is engine knocking. This can be caused by several factors, including improper ignition timing, low-quality fuel, or carbon build-up in the cylinders.

To fix this, start by checking the ignition timing.

• First, you'll need to find the specifications for your particular model of Harley. These can be found in the service manual.
• Once you have the correct specs, you'll need to adjust the ignition timing. This is done by loosening the distributor cap and rotating the distributor.
• Rotate the distributor until the timing mark lines up with the correct number of degrees on the scale. For example, if your model's specifications say that the timing should be set at 8 degrees, you'll need to rotate the distributor until the 8-degree mark lines up with the timing mark.
• Tighten the distributor cap and start the engine. If the knocking noise is gone, then you've successfully fixed the problem.

If you're using low-quality fuel, switch to a higher-grade gas or add an octane booster.

• All you need to do is drain the stock fuel from your tank
• Replace it with higher quality fuel. This will help your engine run smoother and without any knocking.
• You'll need to be sure that you're using high-quality fuel that is OK for Harley engines. There are plenty of options out there, so do your research and find the best one for your needs.

If carbon buildup in the cylinder is the culprit, here's a way to go around the problem:

• Prepare a little elbow grease and some basic tools.
• First, remove the spark plug from the cylinder. Next, use a brush to scrub away any carbon buildup on the plug. Once the plug is clean, re-install it in the cylinder.
• Next, take a look at the cylinder walls. If there's any carbon buildup here, you'll need to remove it with a scraper. Be careful not to damage the cylinder walls as you scrape away the carbon.
• Finally, clean any carbon buildup from the piston and rings. This can be done with a wire brush or a rag.

5. Engine Electrical System Problems

Another common issue with Harley motorcycles is electrical problems in the engine. These can range from simple issues like faulty spark plugs or wires to more serious issues like shorts in the wiring harness.

Here's a way to fix them:

• For starters, you'll need to locate the spark plugs on your motorcycle. They're usually located near the top of the engine, and you may need to remove some other parts to access them.
• Once you've found the spark plugs, use a ratchet or socket wrench to remove them.
• Next, take a look at the spark plug wires. If they're damaged or frayed, they'll need to be replaced. To do this, simply cut the old wires off and strip the ends of the new ones.
• Then, use a wire crimper to attach the new wires to the spark plugs.
• Finish by reassembling your motorcycle and testing it out.

6. Exhaust System Problems

Many Harley 107 owners have also reported exhaust system issues, such as leaks or excessive noise. These problems can often be caused by a build-up of carbon in the exhaust system, or a failure of the muffler packing.

Cleaning the exhaust system and replacing the muffler packing can be done using the following steps:

• The muffler packing can be found at the end of the exhaust pipe. You'll need to remove it by unscrewing the bolts that hold it in place.
• Once the packing is removed, you'll need to clean out the carbon buildup. This can be done with a wire brush or a similar tool. Be sure to remove all of the carbon, as any remaining bits could cause the muffler packing to fail again.
• Once the carbon is removed, you'll need to install new muffler packing. This can be purchased from your local Harley dealer, or online. Be sure to follow the instructions that come with the packing, as it's important to get the right size and type of packing for your exhaust system.
• With the new packing in place, you should now have a functioning exhaust system that doesn't leak or make excessive noise.

7. Fuel system problems

The final common issue with Harley engines is fuel system problems. These can range from simple issues like a dirty fuel filter to more serious issues like a faulty fuel injector.

If you're having fuel system problems with your Harley 107 engine, it might be time to replace the fuel filter. This is a relatively simple task that you can do yourself, and it's a good idea to do it regularly as part of routine maintenance. Here's how to do it:

• Start by draining the fuel from the tank. You can do this by disconnecting the fuel line at the tank and draining it into a container.
• Once the fuel is drained, remove the old filter. It will be located between the fuel tank and the engine and will be held in place with a clamp.
• Install the new filter, making sure it is tight and secure.
• Reconnect the fuel line and fill up the tank.
• Start the engine and check for leaks. If there are any, tighten the connections until they stop.

If you're having fuel system problems that are more serious than a dirty filter, it might be time to replace the fuel injector. This is a more complex task, but it's still something you can do yourself if you're comfortable working on your engine. Here's how:

• Start by disconnecting the battery and removing the air cleaner assembly.
• Locate the fuel injector, which will be mounted on the side of the engine.
• Disconnect the electrical connector and fuel line from the injector.
• Remove the injector from its mount.
• Install the new injector, making sure it is tight and secure.
• Reconnect the electrical connector and fuel line.
• Reinstall the air cleaner assembly and reconnect the battery.
• Start the engine and check for leaks. If there are any, tighten the connections until they stop.

How to Avoid the Common 107 Harley Engine Problems

As the adage says, "Prevention is better than cure." It may be an overused quote but it remains relevant when it comes to taking care of your Harley 107 engine. Providing it with proper maintenance is the key to mitigating your risk of encountering its most common engine problems.

With that, here are ways to ensure the proper operation of its engine for a long time:

• Keep your bike properly tuned: A well-tuned bike will run better and produce less vibration.
• Keep the engine clean: A build-up of dirt and grease can cause oil leaks and other problems. Be sure to clean your engine regularly, and check for any leaks.
• Use high-quality motor oil: Using high-quality oil will help to reduce the likelihood of oil leaks.
• Keep the cooling system clean: A build-up of sediment in the cooling system can cause overheating and other problems. Be sure to flush the system regularly, and check for any leaks. Also, use the recommended antifreeze by your motorcycle brand.
• Use high-quality fuel: Using high-quality fuel can help to reduce engine knocking and other problems.
• Keep the exhaust system clean: A build-up of carbon in the exhaust system can cause excessive noise and may impede the release of harmful gases from your engine.
• Use high-quality fuel filters: Using high-quality fuel filters can help to reduce fuel system problems. Be sure to replace the filter regularly, and check for any leaks.

Conclusion

The Harley-Davidson 107 common engine problems can be avoided with the right information. Whether you are a new rider or a seasoned veteran, be sure to remember these to keep your engine in good running condition for many years to come.