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Oil on Spark Plugs Motorcycle: What You Need to Do?

Motorcycle spark plugs are one of the most important parts of a motorcycle engine. They create the spark that ignites the air/fuel mixture in the cylinders, and they also help to cool the engine by dissipating heat. There are different types of spark plugs available for different types of motorcycle engines, so it is important to choose the right element for your motorbike.

This needs to be replaced periodically, and it is important to follow the manufacturer’s recommendations. Replacing them is a relatively simple task that can be done at home with the necessary tools.

Oil on motorcycle spark plugs is most likely due to a leaking oil seal or gasket. These seals and gaskets keep oil from entering the combustion chamber. Oil can leak into the chamber and coat the plugs when they fail. This can cause it to misfire, resulting in a loss of power and decreased fuel economy. In extreme cases, oil can cause engine damage.

Why Do Spark Plugs Get Oil on Them?

Spark plugs can get oil on them for a few reasons. It could be due to worn-out piston rings, damage to valves, or poor-quality engine oil. The quickest fix is to remove the spark plug, clean it off, and put it back in.

When it comes to your motorcycle, oil is necessary to keep it running properly. However, oil can also be the cause of some problems, including getting oil on the spark plugs.

spark plugs

There are several reasons why oil can get on spark plugs, and it is important to find out the cause in order to fix the problem.

One of the causes of oil on the spark plugs is when the engine is too hot. If the engine is running hot, oil can begin to break down and end up on the spark plugs. This is a problem because it can cause misfires and prevent the engine from running properly. If you use the best motorcycle engine oil, it will last for a while, giving you time to identify the problem and fix it.

Another cause of oil on it is a leaky valve cover gasket. This gasket is responsible for sealing, so if it leaks, oil can get on it. A leaky valve cover gasket is a serious problem that should be repaired as soon as possible.

Oil can also get on if you have a leak. Even a small leak can lead to oil, so it is important to repair any leak as soon as possible.

If you find oil on your spark plugs, it is important to find out the cause so you can fix the problem. This can cause serious engine problems, so don’t ignore it.

Oil on Spark Plugs Is Bad?

If you’re a motorcycle enthusiast, you know that one of the most important aspects of maintaining your ride is keeping the spark plugs in good condition. Not only do they help your motorcycle run smoother, but they also help prevent engine damage. However, if you are not careful, oil can have a detrimental effect and eventually cause them to fail.

spark plug

Over time, oil accumulates on the spark plugs, causing them to become dirty. This can lead to a number of problems, including poor engine performance and increased emissions. In extreme cases, it can lead to engine failure.

To prevent oil from fouling your spark plugs, it’s important to regularly clean them. You can check out the top best cleaning products for your motorcycle. So you will extend the life of your bike and be sure of its condition.

How to Understand That Oil Has Got on the Spark Plugs?

The spark plug getting oil on it can be caused by a few things. Let’s take a look at what the symptoms are.

If you see white smoke coming from your motorcycle’s exhaust, it means that oil is getting into the combustion chamber and coating the spark plug. The oil is then burned along with the fuel, and the resulting gases are exiting the engine through the exhaust.

An oiled spark plug will cause the engine to misfire. You may have difficulty starting the engine if the oil has coated the electrodes too much.

If your fuel economy suddenly drops, one possible reason is that oil has accumulated on the spark plug, preventing it from sparking properly. This causes the fuel mixture in the engine to fail to burn completely, leading to decreased fuel economy.

The reason the power and acceleration are poor is that the spark plugs are not firing correctly because there is oil on the electrodes. This leads to poor engine performance and power generation.

What to Do?

The first thing we need to do is make sure that the spark plug is actually coated in oil. To do that, you’ll need to take the spark plug out and take a look at it. This element is located on the cylinder head and is easily visible in the motorcycle engine next to the end of the distributor cable. All you need to do is remove the cable and the spark plug.

After you take out the spark plug, check to see if it needs to be replaced. If the spark plug is black or worn out, it doesn’t matter if there is oil or not. It is bad and needs to be changed. However, if the spark plug is in good condition but there is a lot of oil, you need to take care of the oil problem.

What you will need:

  • spark plug wrench;
  • socket wrench;
  • wire brush;
  • spray bottle filled with water;
  • clean rag;
  • rubber gloves.

Step-by-step instructions:

  1. Before you begin, make sure that your motorcycle is turned off and cooled down.
  2. Use the spark plug wrench to remove it from the engine. If they are difficult to remove, you can use the socket wrench to loosen them.
  3. Once the spark plugs are removed, use the wire brush to clean off any oil that may be on the outside of it.
  4. Next, use the spray bottle to mist the plugs with water. Be sure to do this in a well-ventilated area as the water will cause the oil to fume.
  5. Use the clean rag to wipe away any remaining oil and water from the plugs.
  6. Finally, re-install the spark plugs and tighten them with the wrench.
  7. Repeat this process every few months to keep your spark plugs clean and working properly.


Can oil on my spark plug cause a misfire?

Oil can cause a misfire from time to time. It is unlikely that this is your problem. Try changing your spark plugs and see if the problem persists.

How do you fix oily spark plugs?

The best way to clean them is to use a wire brush designed specifically for spark plugs. If the plugs are more heavily coated, they will need to be replaced.

Can oily spark plugs cause smoke?

Oily spark plugs can cause smoke, but usually indicate that the engine is not burning oil correctly.


Overall, the oil on the spark plugs can cause a number of problems. First, it can cause the engine to smoke. Second, it can cause the spark plugs to foul, and this can lead to engine misfires. Third, it can cause the engine to run less efficiently. Fourth, it can cause the engine to overheat.

If you find oil on your motorcycle spark plugs, it is important to have the problem fixed as soon as possible. Otherwise, you could end up causing serious damage to your engine.

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