Noz chain feed - o ring help

[loxley007]

Hi all,

I have a 1979 Cb750 question that I hope you can help with. I’m rebuilding the engine and I’m struggling with whether I need an extra o ring for the noz chain feed (the bit that squirts oil into the primary chain). It already has an o ring on either side of it but in all the rebuild videos on YouTube people talk about there being an o-ring that you need to remember to put back in.

I can’t see this referenced in the shop manual so I’m thinking it’s not needed.

Can anyone confirm whether you need an additional o ring for this?

If you do, does it go on top or below the chain feed?

Thank you in advance.

Andrew

 

[loxley007]

Just to add more detail, this is the part that I’m talking about. It fits in between the primary drive chain. It is part 3 on the diagram. My question is whether it is just the 2 o rings needed? People keep saying there is a further o-ring that sits in between the two halves of the crank case…but I don’t understand where! Am I just getting confused?

 

[loxley007]

So, I have answered my own question. The answer is there are only two o-rings.

I took apart my spare engine and carefully looked at the part.

Might be useful info for someone.