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How to Disconnect and Remove the Piston from a Yamaha YZ 125

Model: Yamaha Yz 125

Video tutorial

This guide will show you how to disconnect and remove the piston from the crankshaft of a Yamaha YZ 125. First, remove the top part of the cylinder head, which consists of the head and cylinder; then you can proceed with the piston removal. Use pliers to remove the circlip or retaining ring, then extract the pin inside; slide the piston off the connecting rod of the crankshaft, checking the wear on the roller bearing or bush (replace if necessary); then refit the new cylinder assembly.


Posted on 1 June 2026 by ScegliAuto


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by ScegliAuto

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