These cylinders are Nikasil coated. Takes a really hard hone to do it right. If the cylinder is in good shape, honing is fine.
Search youtube for honing Nikasil, Some guys just run a ball hone down for cleanup, but it's not the right way, according to the machinists. I think a lot do it that way, actually.
If the cylinder is used it generally would need to be sent out and replated. I've found in my builds that the oem jugs get a slight indentation in them where the piston ring stops at TDC. These are obviously very high hour motors, but I imagine this happens to some degree in lower hour motors too. Honing this area would unevenly wear the nikasil. Ball hones work well in our motors to de-glaze the cylinders and get a fresh cross hatch, but I think a standard cylinder hone is asking for trouble.
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