RCV 60 sleeve valve engine cutaway.
https://s3-us-west-1.amazonaws.com/h...e_fullsize.jpg
Previously:
https://www.homemadetools.net/forum/...962#post171693
https://www.homemadetools.net/forum/...853#post171291
https://www.homemadetools.net/forum/...807#post171139
https://www.homemadetools.net/forum/...216#post169105
https://www.homemadetools.net/forum/...157#post168847