Harley Davidson Evolution Engine Problems: What you need to know

The evolution engine is the motor of the motorcycle. It produces power transmitted to the rear wheel through a chain drive and cam-chain tensioner system.

Besides producing power, it also functions as a differential for changing the speeds of the engine and wheels and ensures the smooth transmission of power to the rear wheel. Owning an evolution-engine motorcycle allows you to enjoy high-performance riding with low maintenance costs. It is ideal for riders who love performance and adventure or want a unique piece of machinery that’s easy to maintain.

Besides performance, evolution engines are also popular for their reliability. But before you get into an evolution engine vehicle, you need to understand the common problems associated with them so that in case your bike faces any problem; you know how to fix it and what steps to take next. We have discussed common Harley Davidson Evolution Engine Problems motorcycles and how you can correct them.

Harley Davidson Evolution Engine Problems

Are Harley-Davidson Engines Reliable?

Are Harley-Davidson Engines Reliable

The answer largely depends on the model, but Harley-Davidson engines are generally reliable. Harley-Davidson is popular for its quality engineering and attention to detail, which means that most models are built to last.

For those who prefer to maintain their own engines, a large aftermarket of parts and accessories is available, making it easy to customize and repair your engine. Additionally, Harley-Davidson offers a limited warranty on its engine parts, so you can rest assured that you are getting a reliable product.

Harley-Davidson engines have been regarded as one of the most reliable ones on the market, especially for motorcycles. Most people agree that professional riders are known for their great handling and easy-to-maintain engines.

Harley-Davidson has built engines with strong components, making them durable and reliable. Aside from this, regular maintenance of your engine is key to its reliability. Ignoring it can lead to potential issues, so be sure to do your part in keeping your engine healthy and happy.

7 Common Harley Davidson Evolution Engine Problems & Solutions To Fix Them

7 Common Harley Davidson Evolution Engine Problems & Solutions To Fix Them

There can be many problems with the Harley Davidson Evolution engine, which can be difficult to troubleshoot. However, there are some things that you can do to troubleshoot them. Several problems can occur with Harley Davidson’s evolution engine, ranging from basic maintenance issues to more serious problems.

One of the most common issues is debris in the fuel line. Debris can build up over time and restrict fuel flow to the engine, damaging it. Several issues could affect the performance and overall reliability of your Harley Davidson Evolution. Here are seven common problems and solutions to help you solve them.

1.Low Oil Pressure

Well, low oil pressure is a common issue with the Harley-Davidson Evolution engine. Low oil pressure can lead to difficulty starting the motorcycle and, in some cases, even cause the engine to stop. The Harley-Davidson Evolution engine was released in response to customer demand and was one of the best engines that Harley-Davidson produced.

The bike’s engine is a SOHC liquid-cooled, 60-degree V-twin engine with a displacement of 1,247cc and 122 horsepower at 5,000 rpm. It is an engine with a lot of power and torque on tap. However, low oil pressure can make it hard for the engine to start or run properly.

If you are experiencing low oil pressure on your Harley-Davidson Evolution motorbike, there are several things you can do to fix the problem and get back on the road as soon as possible. The first step is to check the oil level and ensure it is full. If the oil level is low, you should add more oil to the engine. You should also check the oil filter for any clogs or debris.

The clogged oil filter needs to replace with a new one. Additionally, you should check the oil pressure switch, which controls the engine’s oil pressure. If the switch is broken, you should replace it with a new one. Finally, if none of these solutions work, you should take your Harley-Davidson Evolution to a qualified mechanic who can diagnose the issue and provide a more permanent solution.

2.Engine Smoking

Engine Smoking

White smoke is a common problem for Harley Davidson Evolution engines ridden for outputs of 65,000-80,000 miles. White smoke from the engine typically indicates an issue with the fuel injectors or spark plugs. Test the ignition coil to see if it’s worn out or has become dirty.

If there is a cylinder gasket leak, smoking may also result from excessive oil burning in the cylinder. Other causes of white smoke in Harley Davidson Evolution engines include a faulty EIS system that pulls in more air to cool the engine and a clogged air filter.

Activating the EIT MS system can prevent overheating. This system automatically adjusts fuel delivery during high-load situations to help prevent engine overheating.

3.Cam Chain Tensioner

Cam Chain Tensioner

Harley-Davidson Evolution engines can be prone to cam chain tensioner problems due to timing belt slipping. This results in a loud rattling noise from the engine. The cam chain tensioner must constantly work to keep the camshaft from moving back and forth, which can cause wear and tear over time.

By replacing the expensive cam chain tensioner, which is only sometimes covered by warranty, you can quickly rectify such problems. Another possible solution to this problem is installing Timken bearings in the flywheel of Harley-Davidson Evolution engines to help prevent cam chain tensioner problems. By replacing or installing these components, you can ensure that your engine stays running smoothly and reliably.


If the tapping sound in your Harley Davidson engine is persistent and loud, it could be due to a loose cover of the air cleaner or a worn-out bearing on the brake lever. Ensure that you check for these possible problems by tightening all bolts and properly securing all covers.

Also, to ensure thorough engine cleaning and maintenance, replacing the oil and filter every 3 months or 12,000 miles is important. If you hear tapping or clicking noises while riding your motorcycle, you may need to have the mechanic check and adjust the valve clearance or remove carbon deposits on the piston. If you suspect a problem with your Harley Davidson engine, it is best to have it checked by a mechanic.

5.Engine Shuts Off

A defective temperature sensor can directly or indirectly cause an engine to shut off abruptly. When this sensor detects an abnormally high temperature, it automatically shuts the engine down to prevent damage. Other problems leading to engine shutdown include loose fuel pump wires, a bad wiring connection, or broken vacuum lines.

If you are experiencing problems with your engine constantly shutting down, it is best to have it checked by a professional. The problem may be more complex than you think and require multiple solutions. Replacing the temperature sensor or installing a new fuel pump may help reduce engine shutdowns. However, if the problem persists and no other solutions work, consider replacing the engine.

6.Power Loss

Harley-Davidson motorcycles are known for their powerful engine and smooth, comfortable ride. However, engine problems can occur. When power loss occurs in a Harley-Davidson motorcycle engine, it can be caused by a bad ignition problem. o fix the power loss, you should check and replace the air filter, intake manifold, and throttle body.

Other causes of engine power loss include defective crankcase breather hose or oil fill tube gasket. Another possible cause of power loss is low oil pressure in the engine. If so, ensure your Harley-Davidson motorcycle has an oil change and check for low oil pressure or an incorrect oil level.

7.Starting Issues

Some Harley Davidson Evolution models have reported problems with the starting system. One potential issue could be a sticking fuel pump. If this occurs, try to start the bike by manually pumping the handle. If the problem persists, have an expert inspect and repair the motorcycle for free.

Other potential issues with the engine include a misfiring issue or a clogged air filter. If you are experiencing any of these issues, contact a certified mechanic to have them fixed and get your bike back on the road safely and efficiently.

Maintenance Tips For The Evolution Engine

Maintenance Tips For The Evolution Engine

Harley-Davidson’s evolution engine features a twin-cylinder engine that delivers smooth and powerful performance. It’s essential to regularly check the engine oil level and change it when needed. Thoroughly clean the engine at least once a year with a high-quality engine oil and engine cleaning spray.

When the engine is running, check the primary chain periodically for any wear and replace it as necessary. Also, inspect the clutch cable as part of regular maintenance to ensure it operates smoothly and is defect-free. When you remove and re-install parts, make sure to pay particular attention to ensure you properly secure them.

Benefits Of Owning An Evolution Engine Motorcycle

Benefits Of Owning An Evolution Engine Motorcycle

Owning a Harley-Davidson Evolution Engine motorcycle is a great way to experience a V-twin engine’s sheer power and raw speed. An E-Twin engine’s smooth, revving tone will take you through the countryside with the wind in your hair.

The high torque and smooth shifting of an E-Twin make it a great choice for long-distance riding or cruising down the open road. But it doesn’t end there! As one of the most iconic American brands, Harley-Davidson has been producing some of the best motorcycles in the world for decades.

Harley has something for everyone, from classic American muscle bikes to its modern line of premium models. The customizing options at Harley are unparalleled, allowing you to make your Evolution Engine Motorcycle truly yours. Add some showy chrome accessories or bright paint jobs to personalize your ride and make it your own. With so many benefits and options, owning a Harley is an investment you won’t regret.

Read More:
Best And Worst Years For Harley Evo Motor
Harley Evo Vs Twin Cam: What Makes The Difference?



Whether you own a Harley-Davidson motorcycle, you must know the engine evolution engine. It’s an engine that has stood the test of time and is still going strong even today. Thousands of Harleys have used these engines, and their reliability and durability have won hearts.

If you are experiencing any issues with your motorcycle engine, we encourage you to visit a professional mechanic who can diagnose the problem and help you fix it. Several Harley Davidson evolution engine problems, some more serious than others, can occur.

Understanding the various Harley Davidson evolution engine problems and how to prevent them from occurring, you can protect your bike and keep it running smoothly. However, By following these instructions, you can ensure that your motorcycle is running smoothly and efficiently.

Frequently Asked Questions

1.How Long Do Harley Evo Engines Last?

Ans: Harley-Davidson engines typically last 150,000 miles or more with proper maintenance. Proper oiling and gasket replacement can extend the engine’s lifespan. Unusual noises at idle could indicate a defective intake manifold gasket. Random shutting down, loss of power, and unusual sounds are common problems you can solve at home.

2.What’s The Longevity Of HarleyDavidson Engines?

Ans: The average Harley Davidson engine typically lasts 150,000 miles- more than most other engine types. This is partly due to Harley Davidson’s adherence to higher quality parts and equipment and its dedication to regular maintenance and care.

3.What Is The Problem With The Harley Davidson Engine?

Ans: Several design problems with the Harley Davidson Twin Cam engine involve the cam chain system. These problems can result in degraded performance, oil leaks, smoke and stalling at idle, and even bearing failure. These problems can become even worse for older engines that need to be well-maintained. Bad bearings can cause vibrations, strange noises, and oil pressure drops. 

4.Which Harley Davidson Model Has A Problem With Its Engine?

Ans: The Harley Davidson engine is known to have a design flaw in its cam chain system, which causes the plastic shoes to wear out over time. This, in turn, can cause engine problems such as loss of power, random shutdowns, and unusual sounds at idle. Towards the end of the cam chain system’s life, it may even start making a loud noise.

5.How Can I Troubleshoot My Motorcycle’s Engine Problems?

Ans: To troubleshoot engine problems on your motorcycle, start by checking for engine overheating. You could solve this by activating the EIT MS system. In addition, replace the oil if the oil pressure is dropping, ensure the battery is working and getting at least 12 volts or higher, inspect the throttle position sensor and fuel pump fuse for any signs of wear, and check for any loose wires near the coils.

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