« previous next »
Pages: [1]   Go Down

Author Topic: 1969 cb750 carbs  (Read 1775 times)

0 Members and 1 Guest are viewing this topic.

Offline goldarrow

  • one day, i'll be an
  • Old Timer
  • ******
  • Posts: 3,360
1969 cb750 carbs
« on: November 14, 2015, 01:13:01 PM »
Bought this off feebay, looking for casting numbers but they are not there??? Aren't these suppose to have carbs model casting on them?
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 harisuluv

  • Master
  • *****
  • Posts: 2,009
Re: 1969 cb750 carbs
« Reply #1 on: November 14, 2015, 01:59:19 PM »
There is no casting numbers on k0 carbs.  The only number is on the backplate which is B750A.
Logged

Offline goldarrow

  • one day, i'll be an
  • Old Timer
  • ******
  • Posts: 3,360
Re: 1969 cb750 carbs
« Reply #2 on: November 14, 2015, 02:03:02 PM »
Gonna keep looking
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 goldarrow

  • one day, i'll be an
  • Old Timer
  • ******
  • Posts: 3,360
Re: 1969 cb750 carbs
« Reply #3 on: November 14, 2015, 02:06:50 PM »
Found it. B750A stamped on the mounting backplate as harisuluv mentioned, no other castings on the carbs bodies. 


Slides are stuck on all 4, going to cook them in boiler
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 Don R

  • My Sandcast is a
  • Really Old Timer ...
  • *******
  • Posts: 21,633
  • Saver of unloved motorcycles.
Re: 1969 cb750 carbs
« Reply #4 on: November 15, 2015, 09:00:02 PM »
 My PO just cranked the throttle until it broke. L0L! good luck, they're worth the effort.
Logged
No matter how many times you paint over a shadow, it's still there.
 CEO at the no kill motorcycle shop.
 You don't need a weatherman to know which way the wind blows.

Offline goldarrow

  • one day, i'll be an
  • Old Timer
  • ******
  • Posts: 3,360
Re: 1969 cb750 carbs
« Reply #5 on: November 17, 2015, 10:50:34 PM »
Got the slides freed up using hot water ;)
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 Stev-o

  • Ain't no
  • Really Old Timer ...
  • *******
  • Posts: 35,257
  • Central Texas
Re: 1969 cb750 carbs
« Reply #6 on: November 18, 2015, 05:40:49 AM »
You should send them to Nils for vapor blasting. 
Logged
'74 "Big Bang" Honda 750K [836].....'76 Honda 550F.....K3 Park Racer!......and a Bomber!............plus plus plus.........

Offline goldarrow

  • one day, i'll be an
  • Old Timer
  • ******
  • Posts: 3,360
Re: 1969 cb750 carbs
« Reply #7 on: November 24, 2015, 07:58:01 PM »

Quote from: Stev-o on November 18, 2015, 05:40:49 AM
You should send them to Nils for vapor blasting.

Would really love to if I were to build a show bike...
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 goldarrow

  • one day, i'll be an
  • Old Timer
  • ******
  • Posts: 3,360
1969 cb750 carbs
« Reply #8 on: November 24, 2015, 07:59:48 PM »
Can someone verify or confirm that stock Main jets on these K0 carbs are 130? At least that's what I remembered from reading
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 754

  • Really Old Timer ...
  • *******
  • Posts: 29,046
Re: 1969 cb750 carbs
« Reply #9 on: November 24, 2015, 08:04:13 PM »
 I bet 120,s
Logged
Maker of the WELDLESS 750 Frame Kit
dodogas99@gmail.com
Kelowna B.C.       Canada

My next bike will be a ..ANFOB.....

It's All part of the ADVENTURE...

73 836cc.. Green, had it for 3 decades!!
Lost quite a few CB 750's along the way

Offline goldarrow

  • one day, i'll be an
  • Old Timer
  • ******
  • Posts: 3,360
Re: 1969 cb750 carbs
« Reply #10 on: November 24, 2015, 08:21:46 PM »
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 kmb69

  • Master
  • *****
  • Posts: 2,040
Re: 1969 cb750 carbs
« Reply #11 on: November 24, 2015, 08:26:48 PM »
Frank is correct, 120's.
Logged

Offline goldarrow

  • one day, i'll be an
  • Old Timer
  • ******
  • Posts: 3,360
Re: 1969 cb750 carbs
« Reply #12 on: November 24, 2015, 08:30:02 PM »
This carbs set that I just bought came with 115, not surprise as they could have been changed, but only 3 main jets, missing one.  So I looked up in the local Honda parts fiche online and it shows 140, so I'm confused???
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 harisuluv

  • Master
  • *****
  • Posts: 2,009
Re: 1969 cb750 carbs
« Reply #13 on: November 24, 2015, 08:46:50 PM »
Sometimes the Honda parts fiche will show some oversized jet sizes.  Same as how there might oversized Pistons. You want a 120 most likely, although I have seen 115 also. Hondaman has cited some changes during production if you are really curious. 115 will work or you can get 120s.
Logged

Offline kmb69

  • Master
  • *****
  • Posts: 2,040
Re: 1969 cb750 carbs
« Reply #14 on: November 24, 2015, 08:59:42 PM »
Logged
Pages: [1]   Go Up
« previous next »