They come complete with cylinder, piston,piston pin, piston clips and all the gaskets required to complete the job. The beauty with the complete swap is that one comes off the other goes on and your done, 1-3 hours work and she's back together, keeping the kids (any age) happy. This kit fits Z50R 1988 to 1999, all XR and CRF 50,s. Standard bore size.
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