Updated at: 08-07-2022 - By: Lucas

The gas that powers a motorcycle engine is burned with the help of spark plugs. If your motorcycle’s engine is giving you trouble and you want to replace the spark plugs, you may be wondering how many there are.

Most motorcycles have between 4 and 6 spark plugs, but some only have 2. The number of cylinders and the manufacturer’s instructions will determine how many spark plugs a motorcycle has.

Spark plugs are an important part of the engine of a motorcycle. Make sure your bike has good spark plugs if you want it to keep running. Here’s what you should know about motorcycle spark plugs.

Do Motorcycles Have Spark Plugs?

Yes. Motorcycles have spark plugs that help light the fuel in the cylinder when the piston squeezes it to almost a vacuum and then opens the cylinder so that the fuel can be lit in a controlled way to move the engine.

Spark plugs always have a copper core, but the most common kind have a nickel-alloy shell that is fused to the copper core electrodes. Copper spark plugs have a solid copper core, which makes them run cooler and perform more reliably.

Because motorcycle engines are smaller than car engines, the spark plugs are also smaller. There are also different heat ratings on these spark plugs, which means that they are cooler.

How Many Spark Plugs Are In Motorcycles?

How Many Spark Plugs Does A Motorcycle Have

Depending on the type of engine, a motorcycle can have anywhere from one to six spark plugs.

If your motorcycle has a four-stroke engine, you probably have between 4 and 6 spark plugs.

The amount of torque a motor can make is based on the number of spark plugs and cylinders. The more cylinders a bike has, the more power it can make.

How Often Should You Change Your Motorcycle Spark Plugs?

There are many reasons why you might need to change the spark plugs in your motorcycle, such as if they are dirty, worn, or old. Every 8,000 to 10,000 miles, the spark plugs are often changed.

Modern motorcycles can go 15,000 to 16,000 miles before the spark plugs need to be changed. This is because ignition systems have gotten much better over the years.

Before we replace the spark plugs, we need to keep an eye on them to see if they look worn. Every 4,000 to 5,000 miles, we should check the spark plugs on our motorcycles.

Where Are Spark Plugs Located On A Motorcycle?

How Many Spark Plugs Does A Motorcycle Have-2

The spark plugs on a motorcycle screw into the top of the cylinder and stick out into the chamber where the spark is made.

The side electrode is at the bottom of the foot of the spark plug. It is called the ground electrode sometimes.

In some motorcycle models, the spark plugs are covered by plastic covers, and the gas tank or other parts of the fairing may hide them a little.

Types of Motorcycle Spark Plugs

Not every spark plug for a motorcycle is the same. Gap sizes and shapes are different for each type of spark plug.

Copper based

Spark plugs with copper tips are a common and standard type.

Copper is one of the best ways for electricity to move through it, so these plugs don’t get too hot quickly. This makes the spark plug last longer and can keep it in good shape for thousands of miles.

Single Platinum based

Even though copper is a better conductor than platinum, a single platinum plug costs more than a copper one.

Because the metal doesn’t rust or wear down as quickly as copper, they tend to last longer. Their main strength is that they can stand up to abuse well.

Double Platinum based

Spark plugs with two plates of platinum on the tip are called “double platinum.” This makes them last longer and sound better than versions with only one platinum.

But they are more expensive and still have problems with getting too hot.


Iridium is a rare metal that doesn’t rust, but it is more expensive and harder to find.

Iridium’s unique properties make it a good choice for spark plugs because it lasts longer than copper-wire models.

Depending on the manufacturer, you may need to get your iridium spark plugs fixed after 40,000 to 80,000 miles.

Signs That Your Motorcycle Spark Plugs Are Bad

1. Increased misfiring episodes

When the engine doesn’t work right, we can tell right away because the rhythm changes. This happens when the spark plugs don’t make an arc when they should.

2. When the motorcycle backfires

When the engine isn’t running right, the exhaust can sometimes make a loud pop. When the spark plugs don’t have a steady spark, the bike will backfire.

3. Flooded engine

When the engine cranks over and over but doesn’t really start, it is said to be “flooded.”

When this happens, we can smell gas coming from the combustion chamber because the gas is not being burned.

4. The visibly bad condition of the spark plugs

Damaged spark plugs show visible burn marks, broken or bent knobs. Spark plugs can sometimes have rust or corrosion on them.

Helps people do better. Iridium spark plugs help the engine burn fuel more efficiently, reduce pollution, save fuel, and make more horsepower.

Improve fuel economy. With new spark plugs, the engine runs smoothly and doesn’t have to work as hard to keep the combustion process going. This makes the car use less gas.

Reduce exhaust emissions. Spark plugs on motorcycles make it less likely that the engine will misfire, which saves the most fuel.

Speed and engine response are improved. When spark plugs are in good shape, the combustion process works better. Every time we change the spark plugs, the engine runs better and speeds up faster.

Reliable spark plugs are a critical part of a combustion engine and will determine how far your bike can go as well as how quickly it can get there!