« previous next »
Pages: [1]   Go Down

Author Topic: 750 carb o-ring size  (Read 743 times)

0 Members and 1 Guest are viewing this topic.

Offline BruceG

  • Full Member
  • *
  • Posts: 10
750 carb o-ring size
« on: December 11, 2014, 12:32:05 PM »
I need to replace all 4 of my carb float bowl drain 'bolt' o-rings; two of them have split which could to a real mess.  I don't need to buy an entire carb rebuilt kit so I'm looking for the dimensions of the stock o-ring to see if I can find replacements.
Logged
Bruce Giller, Esq.
SOHC/4 #2

'76 CB70F
'72 Moto Guzzi Eldorado
'73 Alfa Romeo GTV

Offline goldarrow

  • one day, i'll be an
  • Old Timer
  • ******
  • Posts: 3,360
Re: 750 carb o-ring size
« Reply #1 on: December 11, 2014, 12:36:00 PM »
$6 orings kit in a box from harbor freight should do just fine
Logged
Life Is Full Of Challenges - And My Backyard Is Full Of SOHC4's

CB550 K0
CB750 K0, K2, K23 JDM, K45, K5
And the little ones z50r, xr50r, st90


750k5 http://forums.sohc4.net/index.php?topic=114817.0

Offline flybox1

  • My wife thinks I'm a
  • Really Old Timer ...
  • *******
  • Posts: 14,289
Re: 750 carb o-ring size
« Reply #2 on: December 11, 2014, 12:54:28 PM »
Quote from: goldarrow on December 11, 2014, 12:36:00 PM
$6 orings kit in a box from harbor freight should do just fine
+1
Buna or viton. both have good chem resistance, or you can take the screw and a bowl to your local auto store.  they typically have a large case of metric and SAE o-rings behind the counter, and can pull a few out to get a set that works.
« Last Edit: December 11, 2014, 01:05:02 PM by flybox1 »
Logged
'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 750cafe

  • Hot Shot
  • ***
  • Posts: 606
Re: 750 carb o-ring size
« Reply #3 on: December 11, 2014, 08:03:21 PM »
Quote from: goldarrow on December 11, 2014, 12:36:00 PM
$6 orings kit in a box from harbor freight should do just fine

Get BOTH the metric and SAE sets. They are both worth much more than their weight in gold.  ;)
Just the gasoline and one minute of your time to go to a store to hunt for one little part, costs more than both sets.

Eric
Logged
Is there anything more fun than riding? They are between your legs and are quiet when you turn them off.

Offline BruceG

  • Full Member
  • *
  • Posts: 10
Re: 750 carb o-ring size
« Reply #4 on: December 12, 2014, 08:19:42 PM »
Since these o-rings contact gasoline, or what is now served up as such, it is better to get them in Viton.  The ethanol just eats up old rubber bits such as o-rings and especially fuel line.
Logged
Bruce Giller, Esq.
SOHC/4 #2

'76 CB70F
'72 Moto Guzzi Eldorado
'73 Alfa Romeo GTV

Offline BruceG

  • Full Member
  • *
  • Posts: 10
Re: 750 carb o-ring size
« Reply #5 on: December 12, 2014, 08:24:36 PM »
And you can get them here: http://www.mcmaster.com/#o-rings/=uzzvhr.  Not sure that I need 25 of the same size, though!
Logged
Bruce Giller, Esq.
SOHC/4 #2

'76 CB70F
'72 Moto Guzzi Eldorado
'73 Alfa Romeo GTV

Offline goldarrow

  • one day, i'll be an
  • Old Timer
  • ******
  • Posts: 3,360
Re: 750 carb o-ring size
« Reply #6 on: December 12, 2014, 08:38:15 PM »
Don't over think it
Logged
Life Is Full Of Challenges - And My Backyard Is Full Of SOHC4's

CB550 K0
CB750 K0, K2, K23 JDM, K45, K5
And the little ones z50r, xr50r, st90


750k5 http://forums.sohc4.net/index.php?topic=114817.0
Pages: [1]   Go Up
« previous next »