Separating top end from bottom end in one piece?

[Sesman]

In respect to the Vesrah kit, did you use the o rings that came with the kit? I’m advised to use a 3mm thick o ring for the cylinder head oil valves rather than the standard 2.5mm item?

[Bryanj]

Pm sent Ken

[alexdecker]

In respect to the Vesrah kit, did you use the o rings that came with the kit? I’m advised to use a 3mm thick o ring for the cylinder head oil valves rather than the standard 2.5mm item?

Yes, I only used sealers and O-rings from the Vesrah kit…

- Alex

[Sesman]

Cheers Alex.

[Johnny4428]

Hi guys, further to this topic on  o ring sizes for cylinder head oil way seals I’ve measured this morning as I was going to fit cylinder head. The machined recess in the surface of barrels is 1mm and my vesrah gasket is 1.65mm I dont see a 2.5mm o ring being a lot of benefit here. I actualy found a 2.65mm o ring in a set I had but even this is not going to cut it. Am I right in thinking this has going to have to be 3mm thick rings?

[SteveD CB500K0]

Won’t the gasket get compressed?


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[Johnny4428]

Steve,  i did wonder about that, but how much is a 1.65mm head gasket liable to compress under full torque? I have not a clue.

[SteveD CB500K0]

Well if it’s compressed from 1.65 to 1.00, then a 2.5 o-ring would be fine.


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[Johnny4428]

Absolutely Steve. This is exactly what I need to know!

[alexdecker]

Absolutely Steve. This is exactly what I need to know!

Did you end up on a 2.5 or 3 O-ring?

[Johnny4428]

I ended up with 2.65mm because that’s all I had. Fingers crossed they do the trick.

[alexdecker]

I ended up with 2.65mm because that’s all I had. Fingers crossed they do the trick.

So - following up on this - did the 2.65 o-rings do the trick?