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Author Topic: source for o rings on fuel pipes  (Read 585 times)

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Offline mrenfro

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source for o rings on fuel pipes
« on: August 31, 2022, 08:34:19 PM »
anybody have a lead on a good source for the orings that are installed on the fuel pipes that join the carbs on a cb350f.  I am not sure of the dimensions.

thanks
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Online Don R

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Re: source for o rings on fuel pipes
« Reply #1 on: August 31, 2022, 08:49:56 PM »
 Hondaman, sent me some for a 750 once. He might still have some. Standardization has caused some sizes to be difficult to find.
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Online newday777

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Re: source for o rings on fuel pipes
« Reply #2 on: September 01, 2022, 01:00:29 AM »
I don't know if the 350F uses the same size as on the 550 and 750, but JT Marks on ebay has them for the 550/750

https://www.ebay.com/itm/323678973607

The other option is to get the carb gaskets set
David Silver Spares has the Honda kits with the orings

https://www.davidsilverspares.com/CB350-FOUR/part_2853/
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Stu
Honda Parts manager in the mid 1970s Nashua Honda
My current rides
1975 K5 Planet Blue my summer ride, it was a friend's bike I worked with at the Honda shop in 76, lots of fun to be on it again
1976 K6 Anteres Red rebuilding project, was originally my brother's that I set up from the crate, it'll breath again soon!
Project 750s, 2 K4, 2 K6, 1 K8
2008 GL1800 my daily ride and cross country runner

Prior bikes....
1972 Suzuki GT380 I had charge of it for a year in 1973 while my friend was deployed and learned to love street riding....
New CB450 K7 after my friend returned...
New CB750 K5 Planet Blue, demise by ex cousin in law at 9,000 miles...
New CB750 K6 Anteres Red, to replace the totaled K5, I sold this K6 at 45k in 1983, I had heavily modified it, many great memories on it and have missed it greatly.....
1983 GL1100A, 1999 GL1500 SE, 1999 GL1500A

Offline Kenzo1979

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Re: source for o rings on fuel pipes
« Reply #3 on: September 01, 2022, 11:28:10 AM »
I put all new gaskets on 400F carbs last year.  I just got viton O-rings of the correct size and thickness through o-rings.com.  Everything works great and there’s no leaks.
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Offline mrenfro

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Re: source for o rings on fuel pipes
« Reply #4 on: September 01, 2022, 03:06:15 PM »
ok thanks all.
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Offline Shtonecb500

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Re: source for o rings on fuel pipes
« Reply #5 on: September 01, 2022, 04:42:10 PM »
there is a harbor freight assortment pack of o rings, blue box has the right size.
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Online newday777

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Re: source for o rings on fuel pipes
« Reply #6 on: September 01, 2022, 06:03:52 PM »
Quote from: Shtonecb500 on September 01, 2022, 04:42:10 PM
there is a harbor freight assortment pack of o rings, blue box has the right size.

Not a good option.  They don't usually have the correct sizes for the orings for Honda fitment.
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Stu
Honda Parts manager in the mid 1970s Nashua Honda
My current rides
1975 K5 Planet Blue my summer ride, it was a friend's bike I worked with at the Honda shop in 76, lots of fun to be on it again
1976 K6 Anteres Red rebuilding project, was originally my brother's that I set up from the crate, it'll breath again soon!
Project 750s, 2 K4, 2 K6, 1 K8
2008 GL1800 my daily ride and cross country runner

Prior bikes....
1972 Suzuki GT380 I had charge of it for a year in 1973 while my friend was deployed and learned to love street riding....
New CB450 K7 after my friend returned...
New CB750 K5 Planet Blue, demise by ex cousin in law at 9,000 miles...
New CB750 K6 Anteres Red, to replace the totaled K5, I sold this K6 at 45k in 1983, I had heavily modified it, many great memories on it and have missed it greatly.....
1983 GL1100A, 1999 GL1500 SE, 1999 GL1500A

Offline DaveBarbier

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Re: source for o rings on fuel pipes
« Reply #7 on: September 06, 2022, 01:39:46 AM »
I don’t know the size for this bike but the 650 with PD carbs are as follows.

Fuel rail o-rings: 6mm ID x 2mm cross section
McMaster part number: 9262K166

They are just carb fuel rail orings so I wouldn’t be surprised if they are the same. If I were you I’d disassemble and measure. McMaster has what you want 100%.
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Offline bryanj

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Re: source for o rings on fuel pipes
« Reply #8 on: September 06, 2022, 01:59:28 AM »
Contact Nurse Julie as she does kits of viton O rings for the 400 and i would think the 350 is same sizes
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Offline Gman

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Re: source for o rings on fuel pipes
« Reply #9 on: September 11, 2022, 12:15:57 PM »
I've used the O-ring Store https://www.theoringstore.com/store/ several times - you can get them in any size and any compound you want, so you just need to know the dimensions.  They don't use USPS shipping anymore, so shipping is more expensive, but if you order all the o-rings you need for a complete rebuild + spares, it works out reasonably.
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