Topic: Anyone know o-ring size for the carb connecting tubes for the '75 CB400F

[trainerrob]

This is the #1 o-ring in the parts fiche that is online.  I am hunting for the connecting tube o-ring size.  I believe the bike takes 12 in total, but it just feels wrong to need to order 4 entire Honda gasket kit for this.

I have found o-ring sizes to a lot of the inner carb parts, but this specific rubber is illusive.  Any wisdom is greatly appreciated. 
 
Update:
So I have it on good authority (4into1.com) that the illusive o-ring is  sized 5.8mm × 1.9mm, which i have also found to be o-ring P006.

We can spend $11-20 per carb to order the gasket set 16010-333-315... or spend 20 cents per o-ring needed...

[dscri001]

I have a cb350F which I believe will have the same size. I just ordered 009 sized o-rings from amazon and got a pack of 100 for a few bucks. Cant remember the exact material type but you can find what you need there or on McMaster Carr (any fuel resistant, buna-n, viton etc). I'll have to check back on the exact measurements.

[Tanerrx]

I'm having the same problem.  I need the o-rings that go on the brass fuel joints that connect each carburetor on my 1980 CB650.  I can't find what size they are online because they are always grouped in a gasket kit or something. 

Anyone have some advice?

[harisuluv]

2x6.

if you need some PM me and I can send you what you need for a few bucks.

[patanegra]

I have the same issue right now and i found these http://www.theoringstore.com/index.php?main_page=product_info&products_id=2311... I am going to order them and hope for the best