I just bought two corsa cylinders, one from Treatland and one from SSS. Both have the same markings below the ports. It looks like boring drill lines that didn’t get honed out. I’ve never seen imperfections in a bore except porosity on nikasil bores. Is this normal for corsa bores? The marks are below the ports but the rings still land there at BDC. They are not raised so maybe they would not damage the rings and maybe actually help hold more oil where needed?
I’ll try to add photos later
Corsa cylinder wall imperfections
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Corsa cylinder wall imperfections
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78 Honda Hobbit Athena
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00 Gilera Runner PM Tuning 172
09 Aprillia SR50 Malossi Team MHR
81 Puch ZA50 Polini
71 CT70 Blue
79 Z50 Red