6 Problems That Harley 114 Engine Owners Face Are Fixed

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If you own a Harley 114 engine motorcycle and are curious to know the problems of this engine then don’t worry.

Harley 114 Engine Problems

Because many of the other users are unaware of the problems of the Harley 114 engine. 

However, we have found the most common problems of Harley 114 and will discuss them and their fixes in this article. 

Let’s dive into:

What are the most common problems with the Harley 114 Engine?

Many users experience faulty radiator issues, engine failure, and excessive vibration during long tours.

Harley 114 Engine Problems

Some users complained the oil consumption issues and clutch failure problems with their Harley 114 engine.  

1. Faulty Radiator

Some users face faulty radiators in Harley 114 engines which creates several other problems. Overheating is a common issue that is caused by a blocked or leaking radiator which impedes the cooling system’s efficiency. 

Furthermore, dust and sediment formation within the radiator can lead to inadequate heat transfer.

Evidence of coolant leaks on the ground or a constantly low coolant reservoir level could also signify a faulty radiator. 

For instance, a blocked radiator may require a coolant flush or potentially a complete replacement if the blockage is severe. 

Leakages, on the other hand, might be resolved with a radiator sealant and may necessitate a new radiator if the damage is extensive. 

Regular maintenance checks and prompt attention to any abnormalities in engine temperature and coolant levels can prevent these issues from escalating. 

2. Engine Fails to Start

The Harley 114 engine may fail to start due to a myriad of problems, including issues with the battery, starter, spark plugs, or fuel system. 

A drained and faulty battery can prevent the engine from starting. Check the battery voltage and, if necessary, recharge or replace it. 

If the starter motor is problematic, it might not crank the engine effectively. Inspect the starter for any physical damage and consider replacing it if needed. 

Harley 114 Engine Problems

Spark plugs, which are responsible for igniting the fuel in the engine, could also be the culprits if they are worn out or fouled.

You should replace the spark plugs to fix the problem. Lastly, if there’s a problem with the fuel system, such as a clogged fuel filter or faulty fuel pump, the engine may not receive the necessary amount of fuel to start. 

Clean and replace the fuel filter and inspect the fuel pump as part of your troubleshooting routine. 

3. Excessive Vibration

Excessive vibration in a Harley 114 engine can be caused by a variety of issues, often connected to the motor’s balance or alignment. 

In some cases, it could stem from the engine mount’s wear and tear or it could be due to an unbalanced drivetrain. Even something as small as loose nuts and bolts can result in abnormal vibrations.

To fix these issues, start by thoroughly inspecting the engine mount, drivetrain, and all connections to identify any signs of damage or looseness. 

Replace any worn-out engine mounts and ensure the drivetrain is balanced properly.

Regular maintenance and inspection of your Harley 114 engine are crucial to prevent excessive vibration and prolong the engine’s lifespan. 

Another common reason for excessive vibration in a Harley 114 engine is an issue with the transmission.

It could be due to worn-out bearings or gears, causing the drivetrain to become unbalanced and resulting in abnormal vibrations. 

In that case, it’s essential to have the transmission inspected and repaired by a professional mechanic. 

Related: Harley 110 Engine Problems

4. Oil Consumption Issues

Oil consumption issues in Harley 114 engines can be attributed to several key factors. One of the primary reasons is oil leakage, often due to worn-out gaskets or seals. 

Harley 114 Engine Problems

Another probable cause is the excessive wear and tear of internal engine components, resulting in high oil usage. Poor quality or incorrect oil type can also lead to oil consumption problems.

To address these issues firstly, check for any visible oil leaks and replace any damaged gaskets or seals. 

If internal wear is suspected, consider a comprehensive engine check-up to spot pistons, rings, or cylinder issues. 

Lastly, ensure you’re using the right type and quality of oil recommended specifically for Harley 114 engines. 

5. Faulty Clutch 

A faulty clutch in a Harley 114 engine can result from several factors. Primarily, wear and tear due to excessive mileage or aggressive riding can lead to clutch slippage, a common problem. 

Other issues may include a degraded clutch cable, improperly adjusted clutch, or oil contamination on the clutch plates.

To fix these issues, consider the following steps:

  • Clutch Slippage: If you notice your engine revving excessively without a corresponding increase in speed, you might be dealing with clutch slippage. This issue typically requires the replacement of the clutch plates.
  • Degraded Clutch Cable: Over time, a clutch cable can stretch, affecting its operation. Inspect the cable for any signs of fraying or corrosion and replace it if necessary.
  • Improperly Adjusted Clutch: The clutch lever should have a small amount of free play. If not, it could be causing your clutch issues. Refer to your owner’s manual for correct adjustment procedures.
  • Oil Contamination: If oil or any other contaminant gets onto the clutch plates, they won’t be able to grip as they should, leading to slipping. If this is the case, the clutch plates will need to be replaced and the source of the oil leak addressed.

6. Engine Overheating

Harley 114 engine overheating may arise due to inadequate coolant levels, a malfunctioning thermostat, a clogged radiator, or an issue with the water pump. Even poor-quality engine oil can lead to overheating.

To rectify these problems, start by checking the coolant levels and refilling if necessary. If the thermostat is defective, it will need to be replaced to ensure proper regulation of coolant flow. 

Similarly, a clogged radiator can be cleaned or replaced to restore its function. The water pump, responsible for circulating coolant, should also be inspected for any malfunctions and repaired or replaced as needed. 

Lastly, regular oil changes with high-quality engine oil can also help prevent overheating, ensuring your Harley 114 engine runs smoothly.

In addition to these common causes, other factors can contribute to engine overheating. These include a faulty cooling fan, a malfunctioning temperature sensor, or even a cracked head gasket. 


Is the 114 Harley engine reliable?

Yes, the 114 Harley engine boasts remarkable reliability. This engine, a part of Harley Davidson’s Milwaukee-Eight series, performs impressively in various conditions, exhibiting strong power and smooth operation. 

Is a Harley 114 fast?

Yes, the Harley 114 is indeed fast. It is an impressive motorcycle, part of Harley’s Softail line, and boasts a 114 cubic inch (1868cc) Milwaukee-Eight engine that delivers significant horsepower and torque. 

How many cc is a Harley 114?

A Harley 114 has a displacement of 1868 cubic centimetres (cc). Its powerful engine provides a smooth and responsive ride, making it a popular choice among Harley enthusiasts.

How many litres is a Harley 114?

The Harley-Davidson 114 engine, also known as the Milwaukee-Eight 114, has a displacement of 1.868 litres. 


Milwaukee Eight Harley 114 is the most reliable and powerful engine in the Harley series. But like other engines of Harley, it also comes with a pack of problems.

Many users face starting problems which could be due to faulty batteries or damaged spark plugs. Some of the owners complained about the radiator issues and many others faced overheating from the engine. 

You can also face vibration issues with time and maybe the oil problems occur with the Harley 114 engine. 

You can also check out the Harley 96 engine, 103 engine, 107 engine, 110 engine, 117 engine, 120R engine, 131 engine and Evolution engine Problems.

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