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Offline brycegp

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Will these carbs fit this motor????
« on: October 18, 2010, 06:12:54 PM »
So I just found these carbs from a local guy...for $80.  Freshly cleaned and rebuilt.

Will they fit my motor...

1975 Honda CB750 Carbs  (K OR F...I dunno)
1971 Honda CB750K motor

I would go home and compare my carbs...but only if I can't varify thru you guys.

I don't wanna risk him selling them cuz I know a rebuilt is more money than we wants for these.  AND I'd have my others to sell to recoop the money anyway.

Thoughts??
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1971 CB750K/F - El Toro
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Online CycleRanger

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Re: Will these carbs fit this motor????
« Reply #1 on: October 18, 2010, 06:43:14 PM »
If they're off a K5 they should 657B's, maybe A's and yes, they should work fine and $80 for the set is a steal.  :)
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Do you have a copy of the Honda Shop Manual or Parts List for your bike? Get one here:
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Offline brycegp

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Re: Will these carbs fit this motor????
« Reply #2 on: October 20, 2010, 11:15:02 AM »
I scored these and they fit.

Lets just get it straight...I'm a newbie...but dead serious about it.

That said...my motor is stamped CB750E-XXXXXX.  I'm told this is a Super Sport motor.  Well these carbs came off a Super Sport.  They are an exact match to the set that came on the bike.

Regardless...here they are.  Rebuilt carbs, polished bowls and velocity stacks.





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1971 CB750K/F - El Toro
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Offline brycegp

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Re: Will these carbs fit this motor????
« Reply #3 on: October 20, 2010, 11:59:25 AM »
OMG!!  I just looked up the going price for a full new carb bank...new and complete.

www.cmsnl.com has the price of this unit listed as 2500 British Pounds.  Thats $4000!!!

WTF??  That can't be right...
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1971 CB750K/F - El Toro
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Offline SOHC Digger

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Re: Will these carbs fit this motor????
« Reply #4 on: October 20, 2010, 01:53:33 PM »
Quote from: brycegp on October 20, 2010, 11:15:02 AM
...my motor is stamped CB750E-XXXXXX.  I'm told this is a Super Sport motor.

ALL ENGINES are stamped CB750E-XXXXXXX EXCEPT for SOME Super-Sports and Hondamatics.

Use this timeline to determine what your engine is:
http://www.hondachopper.com/engine/engine_timeline/timeline.html

In any event, nice steal on the carbs!
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Offline Duanob

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Re: Will these carbs fit this motor????
« Reply #5 on: October 20, 2010, 02:03:55 PM »
I don't think you can buy four rebuild kits w/ jets for $80. Just buy them and resell them if they don't work. you will make a profit.
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Offline SOHC Digger

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Re: Will these carbs fit this motor????
« Reply #6 on: October 20, 2010, 02:25:42 PM »
Quote from: brycegp on October 20, 2010, 11:59:25 AM
OMG!!  I just looked up the going price for a full new carb bank...new and complete.

www.cmsnl.com has the price of this unit listed as 2500 British Pounds.  Thats $4000!!!

WTF??  That can't be right...

Are you looking for some carbs?  Need some rebuilt?
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Offline gnarlycharlie4u

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Re: Will these carbs fit this motor????
« Reply #7 on: October 20, 2010, 02:51:04 PM »
oh my god everything in this thread is so shiny!
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Offline brycegp

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Re: Will these carbs fit this motor????
« Reply #8 on: October 20, 2010, 03:24:53 PM »
Quote from: SOHC Digger on October 20, 2010, 01:53:33 PM
Quote from: brycegp on October 20, 2010, 11:15:02 AM
...my motor is stamped CB750E-XXXXXX.  I'm told this is a Super Sport motor.

ALL ENGINES are stamped CB750E-XXXXXXX EXCEPT for SOME Super-Sports and Hondamatics.

Use this timeline to determine what your engine is:
http://www.hondachopper.com/engine/engine_timeline/timeline.html

In any event, nice steal on the carbs!

AHAHAHAHA!  Of course its EXACTLY the opposite of what I was told.

Thanks for the timeline....I'll look up the exact number...so I know what I'm dealing with once and for all.
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Offline brycegp

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Re: Will these carbs fit this motor????
« Reply #9 on: October 20, 2010, 03:26:36 PM »
Quote from: SOHC Digger on October 20, 2010, 02:25:42 PM
Quote from: brycegp on October 20, 2010, 11:59:25 AM
OMG!!  I just looked up the going price for a full new carb bank...new and complete.

www.cmsnl.com has the price of this unit listed as 2500 British Pounds.  Thats $4000!!!

WTF??  That can't be right...

Are you looking for some carbs?  Need some rebuilt?

I was going to rebuild the set I have but then found a different rebuilt set on Craigslist for $80.

Then I just was looking for some little missing bits like cotter pins online and noticed that price on a complete bank.

So...I'm all set now.
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Offline brycegp

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Re: Will these carbs fit this motor????
« Reply #10 on: October 20, 2010, 03:28:46 PM »
Quote from: gnarlycharlie4u on October 20, 2010, 02:51:04 PM
oh my god everything in this thread is so shiny!

Damn right! ;-) Check out my build thread...

http://forums.sohc4.net/index.php?topic=73552.0
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Offline 754

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Re: Will these carbs fit this motor????
« Reply #11 on: October 20, 2010, 07:50:19 PM »
From what i have seen on your build thread, you are building a clean-looking bike..
 do yourself a favor then, and dont run them tappet covers..
 trust me on this, they look sorta cool.. but do nothing to imptove the looks of a 750 motor..
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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 gnarlycharlie4u

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Re: Will these carbs fit this motor????
« Reply #12 on: October 21, 2010, 08:15:40 AM »
...except that they make accessing the tappets SOOOO easy. you don't even need a wrench to put them on/take them off tightly. just bare hand it.
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bollingball

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Re: Will these carbs fit this motor????
« Reply #13 on: October 21, 2010, 08:51:17 AM »
Looks are in the eye of the beholder.
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Offline brycegp

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Re: Will these carbs fit this motor????
« Reply #14 on: October 21, 2010, 09:49:42 AM »
Quote from: bollingball on October 21, 2010, 08:51:17 AM
Looks are in the eye of the beholder.

+1
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1971 CB750K/F - El Toro
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Offline brycegp

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Re: Will these carbs fit this motor????
« Reply #15 on: October 21, 2010, 10:30:09 AM »
Quote from: gnarlycharlie4u on October 21, 2010, 08:15:40 AM
...except that they make accessing the tappets SOOOO easy. you don't even need a wrench to put them on/take them off tightly. just bare hand it.

+1
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Offline brycegp

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Re: Will these carbs fit this motor????
« Reply #16 on: October 21, 2010, 10:31:51 AM »
Quote from: 754 on October 20, 2010, 07:50:19 PM
From what i have seen on your build thread, you are building a clean-looking bike..
 do yourself a favor then, and dont run them tappet covers..
 trust me on this, they look sorta cool.. but do nothing to imptove the looks of a 750 motor..

-1

...respect, 754.  But I disagree.
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1971 CB750K/F - El Toro
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Offline 754

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Re: Will these carbs fit this motor????
« Reply #17 on: October 21, 2010, 07:22:54 PM »
Ok,I respect your opinion, but will ask you to take a good look at a chromed, shaved, valvecover on a 750 with stock covers..

The problem with anything taller, and I have run the tapered finned ones.. is they look like an added on afterthought, not something that blends seamlessly into the surroundings..

 in the long run, stuff that has good flow, and works togethjer with everything else.. looks the cleanest..
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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 SOHC Digger

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Re: Will these carbs fit this motor????
« Reply #18 on: October 21, 2010, 07:28:44 PM »
Quote from: 754 on October 21, 2010, 07:22:54 PM
Ok,I respect your opinion, but will ask you to take a good look at a chromed, shaved, valvecover on a 750 with stock covers..

The problem with anything taller, and I have run the tapered finned ones.. is they look like an added on afterthought, not something that blends seamlessly into the surroundings..

 in the long run, stuff that has good flow, and works togethjer with everything else.. looks the cleanest..

So picture this:  Allen-head tappet covers!  That would be low-profile, right?  Somebody needs to jump on that!  I'd buy some.
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Offline 754

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Re: Will these carbs fit this motor????
« Reply #19 on: October 21, 2010, 07:32:53 PM »
I did make some prototype no hex ones a while back, they had a knurled edge to tighten them..
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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 SOHC Digger

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Re: Will these carbs fit this motor????
« Reply #20 on: October 21, 2010, 07:42:44 PM »
No pics of these prototypes?  C'mon 754!  You're sitting on a potential gold mine!  Find somebody who can run a lathe and whip out a few batches.  There's a market!
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Offline 754

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Re: Will these carbs fit this motor????
« Reply #21 on: October 21, 2010, 07:53:25 PM »
 They could go into production soon,  The place I started working for recently has a few CNC machines, wuthin 2 blocks of my shop.. I have not yet benn able to actuall see them.. but soon..
 I have a few things that are ready to go into production, but no firm date yet..
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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 SOHC Digger

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Re: Will these carbs fit this motor????
« Reply #22 on: October 21, 2010, 07:59:07 PM »
Quote from: 754 on October 21, 2010, 07:53:25 PM
They could go into production soon,  The place I started working for recently has a few CNC machines, wuthin 2 blocks of my shop.. I have not yet benn able to actuall see them.. but soon..
 I have a few things that are ready to go into production, but no firm date yet..

Keep me posted!
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Offline gnarlycharlie4u

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Re: Will these carbs fit this motor????
« Reply #23 on: October 22, 2010, 09:31:42 AM »
um... guys...



http://www.ttr400.com/catalog.html

edit:
jesus that was rude.
sorry, rehosted.
« Last Edit: October 25, 2010, 11:36:39 AM by gnarlycharlie4u »
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Offline brycegp

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Re: Will these carbs fit this motor????
« Reply #24 on: October 22, 2010, 10:28:33 AM »
What I think Gnarly was trying to show you at that link...

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1971 CB750K/F - El Toro
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