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I’ve done some work on the cylinders tonight and had a go a cleaning up the pitted bore, I’ve got out a lot of the pitting but there is a fair bit which still remains, although it doesn’t feel too bad.I’ve also dug out one of the bore micrometers from work and took some readings.I used the untouched section of the good bore as a reference, measured 64.02mm which is standard spec for the engine. The worn section of the bore was 64.04mm.Then measured the pitted bore, the bottom measures 64.06mm and the top section 64.11mm.The pitted bore is right at the limit stated in the manual (diameter 64.1mm and taper 0.05mm) and as there’s still some pitting remaining I’m probably going to go for a re-bore, at least that can be getting done while I work my way through the other engine parts.