Topic: CB400 mystery seal

[Killer Canary]

Good morning folks,
in the process of reinstalling the top end, I'm having trouble finding a place for a barrel shaped seal somewhat similar to the two cylindrical seals that install over the head alignment dowels.
This one is fairly similar in size but made of a much more pliable rubber.
Can't find it on any of the fiches; meant for the oil pump maybe?
Anyone?

[innovativems]

Post a pic of it


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[strynboen]

is it the valve steam o ring..or one other one ve never use..i got some left over too..

[Killer Canary]

3/8" high by 1/2" O.D.
Similar to but not the same as #4:
www.bikebandit.com/oem-parts/1975-honda-400-super-sport-cb400f/o/m151855#sch399165

[Tim2005]

Can't think where this goes. The oil pump just has o-rings over dowels, so it's not that. What make gasket kit was it, and was it top end only or whole engine?

[Killer Canary]

I'm using a complete engine seal set.
I'll look at close-ups of seal sets and see if I can figure this out.
My rotten memory!

[Killer Canary]

I seem to be an idiot folks.
Images of gasket sets online show only two of the barrel shaped seals.