The rings use an MF style spacer. Two thin steel rings with a nitrided 'wave' spacer.
http://www.federalmogul.com/korihandbook/en/section_24.htmThe box is factory stamped as being for this engine, so they should be right. I see most ring sets for Honda's are the same style now.
We don't have a dial guage, but I can confirm that the 'slop' in the exhaust valve guide is noticeabley bad. The valve stem diameters are well within service limits.
The bore is also well withing service limits and there is no discernable step from 10mm down the bore to the top - I'll have to write down the numbers when I am next at the workshop.
Ben.
