[JonPW98]

Hi

Hope you van help me.

I'm rebuilding a CB350K3 engine.

I have 3 questions:

1) In my complete gasket / seal set were these two rubber tubes / seals. They are around 14mm in diameter and 8mm tall. My manual appears to make no reference to them - can you tell me what they are / where they go (I don't recall them on strip down):



2) I've seen reference to these O Rings https://www.cmsnl.com/products/o-ring49x25_91301426010/#.W1XpwtJKjIU
Though none were included in my gasket etc set. My manual briefly mentions O rings, though it's not clear. (I've replaced the large O rings at the base of the cylinder liners). Please can you tell me where they go?

3) Valve seals - on strip down my head had no valve seals, though my gasket kit included. I've fitted them on re-assembly of the head - just looking for some comfort that they should be there.

Many thanks in advance for your help

Jonathan

 

[Boomer343]

The CB350 doesn't use those seals. Take them out and throw them away.

 

[JonPW98]

Thanks Boomer.....but which ones?

The ones in Q1?

Thanks

Jonathan

 

[ancientdad]

I can't speak to the ones in question 2, but if you know someone who has a DOHC 450 they could use the O-rings in question 1. And as far as I know, the 350 twin doesn't use valve seals.

 

[JonPW98]

Thanks Tom

 

[JonPW98]

Thanks for the answers on 1 and 3. Does anyone have any guidance for Q2 - I'm nearly ready to torque things down, but don't want to mess up?
Many thanks
Jonathan

 

[HerrDeacon]

I believe those small o-rings in Q2 are to go over the three screws that hold on the alternator access cover. Since the alternator is in an oil bath these o-rings help seal the screws. #14 in this diagram: https://www.cmsnl.com/honda-cb350k3-super-sport-1971-usa_model432/partslist/E++10.html#.W1sFaIjPxhE

 

[ancientdad]

Silly me... it was a complete gasket set, after all :-?

 

[JonPW98]

Perry - Thanks. You are a star.

I can now safely start putting things together / torquing down without that worry I'd missed something.

Cheers

Jonathan

 

[JonPW98]

Tom

"Complete" was a lie...I found that out just after I'd chucked the old oil pump gasket........it's not in my kit. Fortunately David Silver came to the rescue.

I nearly have everything I need. (this is not true...I know I still need to buy loads, but the engine can all go together, and go back in the frame).

Thanks again

Jonathan

 

[ancientdad]

Yeah, back when you could still get gasket sets from Honda - top end and bottom end separately - they were complete. Since all of that is out of production, aftermarket companies are putting stuff together from memory, I guess... reminds me of non-factory manuals. I usually buy a couple of top end sets for my 450, Vesrah and NE, and you get a little different stuff with each along with the common gaskets. Then you have duplicates for when you're like me and tear it down twice in less than 2 years...