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I'm starting this so I don't get tempted to clog-up another thread with my own stuff. I've had this GX140 for about 25 years and it was always used for experimenting. It was disassembled 10+ years ago and I thought it got thrown out, but low and behold I found the parts! The original head was...

I thought someone might be interested in seeing the difference between Honda's inline valve head and the hemi 212 from a piston's perspective. Part of the hemi design's appeal for performance is that it allows larger valves to fit in a smaller cylinder. Not such a big deal with the 68mm bore of...

I'm looking for the width across the outside of the valves on a hemi 212 head as shown below. Thanks!

Hi everyone. I'm new here as a member, but not new to the site. I've been playing with cars, bikes, and engines for a long time with a particular interest in fuel injection and forced induction. For years I have periodically stumbled on threads that came up from google searches. There seems to...