I was surprised the number three exhaust valve looks like the other two, thought it would be washed clean and more white. I'm looking at a small phone screen.
My spare K100 engine also has the same hone marks.
Here's another bit of unlikely wishful thinking. I wonder if the previous owner removed the head, and said this is beyond me, I'll put it all back and sell it. Because I'm selling it, I'm not buying a new head gasket. If you reinstall an old, compressed head gasket to normal spec, it might just leak, probably not that much though.
I would phone the previous owner and say thanks I'm very happy with the bike, could you help me with a bit of history about it, any work you did, any work you got done.
Inlet valve three is cleaner, piston three looks like it has more carbon, just saying.
One of the things I've done in the past to stop a leaking old head gasket, is to torque the bolts to just three foot pounds more than spec. But not once removed though. You wouldn't think three foot pounds could make that much difference, but it can.
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