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Removing the piston from a motocross bike is a relatively simple process that can be performed with a few basic tools. The first step is to remove the spark plug and then remove the two bolts that hold the cylinder head in place. Once the bolts are removed, the cylinder head can be lifted off of the engine. The next step is to remove the circlip that holds the piston in place. This can be done by using a pair of pliers or a circlip plier. Once the circlip is removed, the piston can be pulled out of the engine.


To reinstall the piston, follow the removal process in reverse order. The circlip can be replaced by using pliers and then pushed into place over the connecting rod. After that, the cylinder head can be replaced along with any other parts removed during disassembly. While this may seem like a complicated process, it's actually very easy and can be completed within a few minutes.

The spark plug should be replaced when the piston is removed. A new circlip is required to ensure that the piston is properly sealed within the engine. It's a good idea to change other minor components, such as gaskets, screws, and bolts, whenever the cylinder head is removed from an engine to avoid future problems resulting from wear and tear

Cylinder Heads

Cylinder heads need to be replaced after each rebuild. Since the engine is typically destroyed during disassembly, it should be replaced with a new one before reinstalling the piston. Replacing the cylinder head will ensure that no defects are present that could lead to future problems. This also applies to other parts that were removed during disassembly. The engine should always be completely free of defects before it is reinstalled.

These steps should help to guide an individual through the simple process of removing and replacing the piston on a motocross bike. This type of maintenance can save money in the long run by preventing major problems within an engine.

If you are in any doubt we would always recommend using a skilled mechanic and this should only be taken as general guidance.

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Safe riding!

Motocross Parts UK

Motocross Parts UK


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