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A Guide to Fuel Filters

inline fuel filter

What is a Fuel Filter?

The motorcycle fuel filter is one of the most important components of a modern engine. They ensure that only clean fuel is sent to the engine by removing dirt, debris and other contaminants.  Modern fuel systems are very sensitive to contaminants in the fuel and even the smallest particle can cause expensive damage by eroding the fuel pump, valves or injectors.  Fuel filters also maximise performance as clean fuel burns more efficiently.

It is recommended that the fuel filter is changed every 5,000 to 10,000 miles. However, this can vary depending on the motorcycle and the amount of riding.

Benefits of Regularly Changing Fuel Filters

1. Maximum Engine Performance

The most noticeable benefit of a clean fuel filter is engine performance.   Modern high-precision fuel systems have very little tolerance to impurities in the fuel.  These impurities can have a severe abrasive effect on the engine components and negatively affect engine performance as a result.

2. Clean Fuel Injectors

Fuel injectors spray a precise amount of fuel into the intake manifold.  Impurities in the fuel can easily block or completely destroy one of these injectors.  Replacing a fuel filter according to manufacturer’s guidelines can prevent this and prolong the life of such engine components. Furthermore, injectors are far more expensive to buy and replace then fuel filters.

3. Prevent Engine Misfires

An engine can misfire due to an incorrect fuel to air mixture, as mentioned above, a clogged or ineffective fuel filter can restrict the amount of fuel to the engine leading to an air-heavy mixture.

Symptoms of a Clogged Fuel Filter

When a fuel filter becomes clogged the fuel pump must work harder to pump sufficient fuel into the engine.  A clogged fuel filter is more noticeable when the demand for fuel is higher than normal i.e. when riding up a hill or during acceleration. The fuel pump is put under increased pressure as it attempts to bring more fuel from a clogged and restrictive fuel filter.

The following symptoms are also good indicators:

1. Engine Will Not Start

If the fuel filter is completely blocked the necessary amount of fuel may not reach the engine for it to start.

2. Difficulty in Starting the Engine

As the clogged filter is limiting the amount of fuel to the engine it may take longer to start the engine than normal.

3. Engine Hesitation

The flow of fuel to the engine may become inconsistent resulting in misfires or some hesitation when trying to accelerate.

4. Stalling

The engine may stall and come to a complete stop if the amount of fuel getting to the engine is insufficient.

Buy Fuel Filters on MPS

We stock a wide selection of fuel filters and new filters being added all the time, so please ask if the filter you require is not there.


One of the best ways to ensure you purchase the correct fuel filter is to take measurements of the one currently on the motorcycle and use this as a reference to the dimensions of the one listed on our website.  It’s important to note that different brands take measurements from different parts of the filter.  The measurements they use are shown in the corresponding images of the filter.

If you have any questions please message us and we will do our very best to help you.


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