Author Topic: are there any good sources for float bowl gaskets  (Read 204 times)

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Offline 02z06dave

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are there any good sources for float bowl gaskets
« on: October 08, 2018, 07:28:22 pm »
I typically try to save the originals if i can, but the bike (cb350f) didn't come with any, so I had to buy new ones. I've bought from pretty much all of the ebay sellers and they all seem to sell the same gaskets. They are all too small when you first fit them, then they swell up huge after they touch fuel. Its making it a real pain dealing with these carbs. Are there any sellers out there that use the proper rubber for the gaskets?

Offline MauiK3

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Re: are there any good sources for float bowl gaskets
« Reply #1 on: October 08, 2018, 08:12:14 pm »
I got my carb rebuild stuff from Yamiya 750.com
No failures, all good.
1973 CB 750 K3
2009 Ruckus!

Offline AwesomeCB

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Re: are there any good sources for float bowl gaskets
« Reply #2 on: October 09, 2018, 02:25:53 am »
Any reason you don’t want OEM gaskets, which you can get from many Honda dealers, eBay and so on? After trying all kinds of aftermarket parts for my bikes, I try to stick with OEM for most everything.
All I want to do is ride my bike and not get hassled by the man.

Offline madmtnmotors

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Re: are there any good sources for float bowl gaskets
« Reply #3 on: October 09, 2018, 04:21:42 am »
they swell up huge after they touch fuel laced with ethanol

Stock Honda parts resist the affects of ethanol quite well. If you are left with only aftermarket options for fuel related rubber bits (i.e. NLA from Honda) then try to find rubber bits made of Viton rubber. It will usually be indicated in the description portion of the ad, like these:

https://4into1.com/shaped-o-ring-float-bowl-gaskets-4-pack-honda-cb350f-cb400f/
TAMTF...


Wilbur



My most recent project "Evolution": http://forums.sohc4.net/index.php?topic=100352.0
F2/F3 O-rings: http://forums.sohc4.net/index.php?topic=113672.msg1300721#msg1300721
Cam Tower Studs: https://www.mcmaster.com/#93210a017/=t19sgp
Clean up that nasty harness: http://forums.sohc4.net/index.php?topic=137351.msg1549191#msg1549191
                                           http://forums.sohc4.net/index.php/topic,148188.msg1688494.html#msg1688494
                                           http://forums.sohc4.net/index.php/topic,139544.msg1579364.html#msg1579364
                                           http://oldmanhonda.com/MC/wiring750K1.html
Charging system diagnosis: http://forums.sohc4.net/index.php?topic=1012.msg8345#msg8345
Get the manuals: http://manuals.sohc4.net/cb750k/
The Dragon: http://forums.sohc4.net/index.php?topic=45183.msg1571675#msg1571675
Headlight Switch: http://forums.sohc4.net/index.php?topic=113986.msg1283236#msg1283236
Branden's leak free top end thread: http://forums.sohc4.net/index.php?topic=107040.0
Engine Lifting Made Easy: http://forums.sohc4.net/index.php/topic,58210.msg1684742.html#msg1684742
                                      http://forums.sohc4.net/index.php/topic,100352.msg1675840.html#msg1675840
Static and Dynamic Timing: http://www.hondachopper.com/garage/carb_info/timing/timing1.html
Airbox Gasket Replacement: http://forums.sohc4.net/index.php/topic,114485.msg1290000.html#msg1290000
"Café" : http://forums.sohc4.net/index.php/topic,84697.msg953814.html#msg953814
PD Carb Choke Linkage: http://forums.sohc4.net/index.php/topic,100352.msg1669248.html#msg1669248
                                    http://forums.sohc4.net/index.php/topic,110931.msg1248354.html#msg1248354
Follow up on your damn posts: http://forums.sohc4.net/index.php/topic,144305.msg1791605.html#msg1791605
Taiwanese Cam Chain Tensioners:  http://forums.sohc4.net/index.php/topic,155043.msg1774841.html#msg1774841
Gumtwo Seat Cover: http://forums.sohc4.net/index.php/topic,164440.msg1897366.html#msg1897366
Primary Drive: http://forums.sohc4.net/index.php/topic,166063.msg1919278.html#msg1919278
Tank Latch: http://forums.sohc4.net/index.php/topic,165975.msg1919495.html#msg1919495
Shorten your forks: http://vintage-and-classic-honda-s.456789.n3.nabble.com/How-to-shorten-forks-td4042465.html DO NOT CUT THE SPRINGS!
Clutch How To: http://vintage-and-classic-honda-s.456789.n3.nabble.com/How-to-change-and-adjust-a-clutch-SOHC-td4040391.html
Sent from my Tandy TRS-80!

Offline ekpent

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Re: are there any good sources for float bowl gaskets
« Reply #4 on: October 09, 2018, 05:25:27 am »
 I used some quality 68mm x 2mm round o-rings on a recent 550 and 500 project and they worked well so far on the bowls. Good idea to replace all the other o-rings in there on the jet,fuel valve etc. also if they are like the 500/550 carbs.

Offline flybox1

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Re: are there any good sources for float bowl gaskets
« Reply #5 on: October 09, 2018, 07:34:46 am »
they swell up huge after they touch fuel laced with ethanol

Stock Honda parts resist the affects of ethanol quite well. If you are left with only aftermarket options for fuel related rubber bits (i.e. NLA from Honda) then try to find rubber bits made of Viton rubber. It will usually be indicated in the description portion of the ad, like these:

https://4into1.com/shaped-o-ring-float-bowl-gaskets-4-pack-honda-cb350f-cb400f/
^^^^ this.  4into1 is a good seller.
'78 750K (F3 engine) PD42b's, Modified airbox w/K&N  filter, 40/110 jets, 1 needle shim, IMS@ 1 turn out. Kerker + Cone 18" QuietCore

Past Bikes
1974 550K0 (stock), 1973 CB350F (stock), 1983 Yamaha XS400K (POS)
77/78 cool 2 member #3
"Knowledge without mileage equals bullsh!t" - Henry Rollins

"This is my CB. There are many like it, but this one is mine…"

Offline 02z06dave

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Re: are there any good sources for float bowl gaskets
« Reply #6 on: October 09, 2018, 09:03:10 am »
Any reason you don’t want OEM gaskets, which you can get from many Honda dealers, eBay and so on? After trying all kinds of aftermarket parts for my bikes, I try to stick with OEM for most everything.

I haven't seen oem honda gaskets anywhere or i would have bought them.

Offline 02z06dave

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Re: are there any good sources for float bowl gaskets
« Reply #7 on: October 09, 2018, 09:04:23 am »
they swell up huge after they touch fuel laced with ethanol

Stock Honda parts resist the affects of ethanol quite well. If you are left with only aftermarket options for fuel related rubber bits (i.e. NLA from Honda) then try to find rubber bits made of Viton rubber. It will usually be indicated in the description portion of the ad, like these:

https://4into1.com/shaped-o-ring-float-bowl-gaskets-4-pack-honda-cb350f-cb400f/

Im currently on my 2nd set from 4 into 1. The exact ones you posted. They are the same as all the rest

Offline madmtnmotors

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Re: are there any good sources for float bowl gaskets
« Reply #8 on: October 09, 2018, 09:21:00 am »
they swell up huge after they touch fuel laced with ethanol

Stock Honda parts resist the affects of ethanol quite well. If you are left with only aftermarket options for fuel related rubber bits (i.e. NLA from Honda) then try to find rubber bits made of Viton rubber. It will usually be indicated in the description portion of the ad, like these:

https://4into1.com/shaped-o-ring-float-bowl-gaskets-4-pack-honda-cb350f-cb400f/

Im currently on my 2nd set from 4 into 1. The exact ones you posted. They are the same as all the rest

That's odd. "Same as all the rest"? You mean they are turning soft and swelling excessively? I have had good results with Viton rubber. I wonder if the supplier of these to 4into1 is cheating on the Viton construction? Maybe they just take plain rubber gaskets and wave it over the vat of Viton rubber?  ???

I would reach out to 4into1 and explain the failure of the supposedly "Viton" rubber when exposed to ethanol based fuel. True Viton rubber should not react to ethanol that way.
TAMTF...


Wilbur



My most recent project "Evolution": http://forums.sohc4.net/index.php?topic=100352.0
F2/F3 O-rings: http://forums.sohc4.net/index.php?topic=113672.msg1300721#msg1300721
Cam Tower Studs: https://www.mcmaster.com/#93210a017/=t19sgp
Clean up that nasty harness: http://forums.sohc4.net/index.php?topic=137351.msg1549191#msg1549191
                                           http://forums.sohc4.net/index.php/topic,148188.msg1688494.html#msg1688494
                                           http://forums.sohc4.net/index.php/topic,139544.msg1579364.html#msg1579364
                                           http://oldmanhonda.com/MC/wiring750K1.html
Charging system diagnosis: http://forums.sohc4.net/index.php?topic=1012.msg8345#msg8345
Get the manuals: http://manuals.sohc4.net/cb750k/
The Dragon: http://forums.sohc4.net/index.php?topic=45183.msg1571675#msg1571675
Headlight Switch: http://forums.sohc4.net/index.php?topic=113986.msg1283236#msg1283236
Branden's leak free top end thread: http://forums.sohc4.net/index.php?topic=107040.0
Engine Lifting Made Easy: http://forums.sohc4.net/index.php/topic,58210.msg1684742.html#msg1684742
                                      http://forums.sohc4.net/index.php/topic,100352.msg1675840.html#msg1675840
Static and Dynamic Timing: http://www.hondachopper.com/garage/carb_info/timing/timing1.html
Airbox Gasket Replacement: http://forums.sohc4.net/index.php/topic,114485.msg1290000.html#msg1290000
"Café" : http://forums.sohc4.net/index.php/topic,84697.msg953814.html#msg953814
PD Carb Choke Linkage: http://forums.sohc4.net/index.php/topic,100352.msg1669248.html#msg1669248
                                    http://forums.sohc4.net/index.php/topic,110931.msg1248354.html#msg1248354
Follow up on your damn posts: http://forums.sohc4.net/index.php/topic,144305.msg1791605.html#msg1791605
Taiwanese Cam Chain Tensioners:  http://forums.sohc4.net/index.php/topic,155043.msg1774841.html#msg1774841
Gumtwo Seat Cover: http://forums.sohc4.net/index.php/topic,164440.msg1897366.html#msg1897366
Primary Drive: http://forums.sohc4.net/index.php/topic,166063.msg1919278.html#msg1919278
Tank Latch: http://forums.sohc4.net/index.php/topic,165975.msg1919495.html#msg1919495
Shorten your forks: http://vintage-and-classic-honda-s.456789.n3.nabble.com/How-to-shorten-forks-td4042465.html DO NOT CUT THE SPRINGS!
Clutch How To: http://vintage-and-classic-honda-s.456789.n3.nabble.com/How-to-change-and-adjust-a-clutch-SOHC-td4040391.html
Sent from my Tandy TRS-80!

Offline 02z06dave

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Re: are there any good sources for float bowl gaskets
« Reply #9 on: October 09, 2018, 09:27:05 am »
they swell up huge after they touch fuel laced with ethanol

Stock Honda parts resist the affects of ethanol quite well. If you are left with only aftermarket options for fuel related rubber bits (i.e. NLA from Honda) then try to find rubber bits made of Viton rubber. It will usually be indicated in the description portion of the ad, like these:

https://4into1.com/shaped-o-ring-float-bowl-gaskets-4-pack-honda-cb350f-cb400f/

Im currently on my 2nd set from 4 into 1. The exact ones you posted. They are the same as all the rest

That's odd. "Same as all the rest"? You mean they are turning soft and swelling excessively? I have had good results with Viton rubber. I wonder if the supplier of these to 4into1 is cheating on the Viton construction? Maybe they just take plain rubber gaskets and wave it over the vat of Viton rubber?  ???

I would reach out to 4into1 and explain the failure of the supposedly "Viton" rubber when exposed to ethanol based fuel. True Viton rubber should not react to ethanol that way.

Yeah, i bought a set from them for one bike, then ordered another set for another bike. The carbs one bike 1 were leaking from the over flows so i took the carbs apart to check float height and the gaskets were so swollen up that they were unusable. Luckily i had the other set ready. Unfortunately, even new, they dont fit the bowls. They're just a little too small. It makes installing them a little challenging

Offline flybox1

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Re: are there any good sources for float bowl gaskets
« Reply #10 on: October 09, 2018, 09:31:32 am »
The listing says they are viton, so they should not swell, no matter how long they sit in fuel.
I think a call to 4into1 is warranted....
'78 750K (F3 engine) PD42b's, Modified airbox w/K&N  filter, 40/110 jets, 1 needle shim, IMS@ 1 turn out. Kerker + Cone 18" QuietCore

Past Bikes
1974 550K0 (stock), 1973 CB350F (stock), 1983 Yamaha XS400K (POS)
77/78 cool 2 member #3
"Knowledge without mileage equals bullsh!t" - Henry Rollins

"This is my CB. There are many like it, but this one is mine…"

Offline AwesomeCB

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Re: are there any good sources for float bowl gaskets
« Reply #11 on: October 09, 2018, 10:33:16 am »
Any reason you don’t want OEM gaskets, which you can get from many Honda dealers, eBay and so on? After trying all kinds of aftermarket parts for my bikes, I try to stick with OEM for most everything.

I haven't seen oem honda gaskets anywhere or i would have bought them.

I thought places like Partzilla, Southside Honda etc. sold them. I get OEM CB750 parts from them often. There's also eBay, if you want to go that route. Here's the first ad I came across:
https://www.ebay.com/itm/Honda-CB350-CB350F-CB-350-carburetor-carb-gasket-seal-set-OEM/183338768000?epid=1111840439&hash=item2aafd79680:g:NNAAAOSwEzxYRE~h:rk:30:pf:0
All I want to do is ride my bike and not get hassled by the man.

Offline madmtnmotors

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  • Sunny Central Florida
Re: are there any good sources for float bowl gaskets
« Reply #12 on: October 09, 2018, 11:31:00 am »
TAMTF...


Wilbur



My most recent project "Evolution": http://forums.sohc4.net/index.php?topic=100352.0
F2/F3 O-rings: http://forums.sohc4.net/index.php?topic=113672.msg1300721#msg1300721
Cam Tower Studs: https://www.mcmaster.com/#93210a017/=t19sgp
Clean up that nasty harness: http://forums.sohc4.net/index.php?topic=137351.msg1549191#msg1549191
                                           http://forums.sohc4.net/index.php/topic,148188.msg1688494.html#msg1688494
                                           http://forums.sohc4.net/index.php/topic,139544.msg1579364.html#msg1579364
                                           http://oldmanhonda.com/MC/wiring750K1.html
Charging system diagnosis: http://forums.sohc4.net/index.php?topic=1012.msg8345#msg8345
Get the manuals: http://manuals.sohc4.net/cb750k/
The Dragon: http://forums.sohc4.net/index.php?topic=45183.msg1571675#msg1571675
Headlight Switch: http://forums.sohc4.net/index.php?topic=113986.msg1283236#msg1283236
Branden's leak free top end thread: http://forums.sohc4.net/index.php?topic=107040.0
Engine Lifting Made Easy: http://forums.sohc4.net/index.php/topic,58210.msg1684742.html#msg1684742
                                      http://forums.sohc4.net/index.php/topic,100352.msg1675840.html#msg1675840
Static and Dynamic Timing: http://www.hondachopper.com/garage/carb_info/timing/timing1.html
Airbox Gasket Replacement: http://forums.sohc4.net/index.php/topic,114485.msg1290000.html#msg1290000
"Café" : http://forums.sohc4.net/index.php/topic,84697.msg953814.html#msg953814
PD Carb Choke Linkage: http://forums.sohc4.net/index.php/topic,100352.msg1669248.html#msg1669248
                                    http://forums.sohc4.net/index.php/topic,110931.msg1248354.html#msg1248354
Follow up on your damn posts: http://forums.sohc4.net/index.php/topic,144305.msg1791605.html#msg1791605
Taiwanese Cam Chain Tensioners:  http://forums.sohc4.net/index.php/topic,155043.msg1774841.html#msg1774841
Gumtwo Seat Cover: http://forums.sohc4.net/index.php/topic,164440.msg1897366.html#msg1897366
Primary Drive: http://forums.sohc4.net/index.php/topic,166063.msg1919278.html#msg1919278
Tank Latch: http://forums.sohc4.net/index.php/topic,165975.msg1919495.html#msg1919495
Shorten your forks: http://vintage-and-classic-honda-s.456789.n3.nabble.com/How-to-shorten-forks-td4042465.html DO NOT CUT THE SPRINGS!
Clutch How To: http://vintage-and-classic-honda-s.456789.n3.nabble.com/How-to-change-and-adjust-a-clutch-SOHC-td4040391.html
Sent from my Tandy TRS-80!

Offline 02z06dave

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Re: are there any good sources for float bowl gaskets
« Reply #13 on: October 10, 2018, 05:23:57 am »
Any reason you don’t want OEM gaskets, which you can get from many Honda dealers, eBay and so on? After trying all kinds of aftermarket parts for my bikes, I try to stick with OEM for most everything.

I haven't seen oem honda gaskets anywhere or i would have bought them.

I thought places like Partzilla, Southside Honda etc. sold them. I get OEM CB750 parts from them often. There's also eBay, if you want to go that route. Here's the first ad I came across:
https://www.ebay.com/itm/Honda-CB350-CB350F-CB-350-carburetor-carb-gasket-seal-set-OEM/183338768000?epid=1111840439&hash=item2aafd79680:g:NNAAAOSwEzxYRE~h:rk:30:pf:0

I could give those a try. In the past, ive stayed away from the round ones vs the shaped ones because of terrible fit. I didnt realize that was oem for these

 

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