SOHC.co.uk Forums > CB500/550
CB550k1 US Import - UK registration
juitz:
This is wider shot - the pitting is just around the edge. I assume since the rest of the surface is ok the gasket should seal?
I've lapped it a few more timeswith fine grade lapping compound and it is cleaning up.
Laverdaroo:
Dave if that looks like that there's history. If you're this far in another 40 quid to get it decked is a no brainer mate.You'll forever think about it and it's a point of potential niggle.
Surprisingly, on my heap, the head was in pretty fair nick, both inside and out and fiddling with straight edges revealed that I thought it was flat. You know, bits of glass to sit it on and feeler guages just to get an idea etc but had it done anyway as a guarentee. The machinist said he had to give it thress passes to get it spot on. Although it looked cock on, it just goes to show that after 40 odd years of use/neglect, things shift about and loose spec really easily. With yours having issues in the past, its 40 quid bud, annoying but get it done.
And it comes back all lovely and shiney................which is nice! ;D ;)
Laverdaroo:
Mmmmm
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K2-K6:
Maybe all right with the seats cleaning up (honda have tight tolerancing and angle, width etc of seat themselves) with some minor flow detriment, but not a serious worry on a road engine.
The head surface though is considerably more, ahem, agricultural than when it was made. It does look like someone has had an interpretive go at clearing it in the past.
I can't readily see a route to correct re-establishment of the surface other than a skim at this stage.
McCabe-Thiele (Ted):
If it was my cylinder head I would ask for the lightest possible skim to remove the marks.
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