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To replace the piston on the TM Racing 125, loosen the screws that secure the side fairings of the bike to access the underlying components. Here, you will find the cylinder, which must be removed by loosening its bolts: inside the cylinder is the piston, which can be detached from the connecting rod by removing the corresponding circlip. The new piston can then be placed on the connecting rod and secured with the appropriate ring; after installing the new piston, reinsert the cylinder and the side fairings.

Updated on 2 May 2026 by ScegliAuto

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