Motorcycle fuel filters purify the fuel that is supplied into the engine. They prevent dust, moisture and corrosion products from getting into the fuel system.

Types of motorcycle fuel filters

By the type of the injection system:

• Filters for carburettor engines. They are installed into the hose before the carburettor. Alongside this, a mesh for primary filtering is fitted into the fuel tank. They can have plastic or metal housing. The former ones are cheaper and for single use only. The latter ones can be washed and reused.
• Filters for injector engines. They are located in the fuel tank next to the pump. They can’t be disassembled and are maintenance-free.

By the material they are made of:

• Magnetic. They trap the tiniest metal particles and are only used in carburettor fuel systems.
• Paper. They capture metal dust as well as sand, moisture and other impurities.

Some motorcycle fuel filters are fitted with a fuel pressure regulator in the fuel line.

Malfunctions: their causes and symptoms

• Clogging. This might be a result of very long use, or caused by a poor-quality fuel. This manifests itself in a reduced engine power; which is especially noticeable when abruptly accelerating. Besides, the power unit might run erratically and be difficult to start.
• Mechanical damage. Due to the design of some vehicles, the location of the component might make it vulnerable to the road stones hitting it. Cracks on the housing can be easily seen. Apart from that, fuel leakage often occurs.

Tips on how to maintain and replace motorcycle fuel filters

• Regardless of the component type, it is recommended to replace it before every motoring season. That will help to prevent injectors from getting clogged. Many manufacturers specify replacement intervals in the operating manual of the vehicle.
• The part should be installed in accordance with the motorcycle user manual. When mounting, observe the direction of the fuel flow in the line.
• Before you dismantle the part, remove the negative terminal from the battery. It is also very important to make sure that there are no flammables in the nearby.
• If the vehicle hasn’t been used for a long time, before fitting in a new filtering element, you should replace the fuel in the tank. The fact is, that in time it loses its properties which produces a negative effect on the lifespan of the component and on the engine in general.

AUTODOC: only high-quality motorcycle parts

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