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Hello All, New to forums New to repairing bikes.
I have a 74 CB750 with seized carbs. Ive found a few options out there but my question is what carbs are compatible for my 74. Ive seen some advertise on Ebay and such that there carbs fit models 69-76. Does anyone know if all these years are truly compatible, or if there is a site to find the info? So far I can not find a straight answer. Thanks for your help
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Administrator
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Welcome to the forum. The carbs are the same from 70-76. Are yours not rebuildable?
TOOLS
Life is not about the number of breaths, you take, but the moments that take your breath away.
I don't have an anger problem. I have an idiot problem. Hank Hill
Never confuse education for intelligence.
Happiness is a belt fed weapon.
I just can't imagine what could go wrong.
No fire? No explosions? So whats the point of your story?
Those who are too smart to engage in politics are punished by being governed by those who are dumber. ~Plato
It couldn't be done, but the darn fool didn't know it, and did it anyway.
We all got problems. Ksharp
I like vintage bikes because they take me away from the clutter of technology that I work with everyday and back to a simpler time of mechanical elegance and simplicity.. "ninadm"
Darkwing Duck: The worst part of public transportation is the Public.
"That is awesome shit there" Re-Run
"Fear nothing, attack everything" Eric Berry
" Oh, you read that on the internet? Clearly it IS a massive problem. Of course it CAN’t be normal operation."
1976 CB 750-A X 2
1977 CB 750-A X 4
1977 CB 750-K
1976 CB 750 F
1981 CB 750
1966 Kawasaki SG 250
1981 KZ 750 LTD
1973 CB 350
1979 CM 185 Twinstar
1982 Honda XL 80
South of Eden (Kansas City MO)
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Administrator
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What part is seized? You might only need 1 carb. Anyways, for best results, 71-76 K will work perfectly.
The ride IS the adventure. The destination is just to get gas!
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Thanks for the welcome. Yeah the old carbs are in really bad shape. The guy that had the bike before me is pretty experienced and he couldnt get them to rebuildable condition. I wish they were, Ive spent the last few nights watching videos on rebuilding carbs so I'm ready to tackle some. The local salvage spot by me doesnt have any so it looks like I'm at the mercy of Ebay for now. Thanks for the help
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Administrator
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Here is another set. http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&_trksid=p4340.m656&item=280714407523&viewitem=&_trkparms=clkid%3D1713368604124692After looking at these auctions, maybe I should sell some of my stash, and retire.
TOOLS
Life is not about the number of breaths, you take, but the moments that take your breath away.
I don't have an anger problem. I have an idiot problem. Hank Hill
Never confuse education for intelligence.
Happiness is a belt fed weapon.
I just can't imagine what could go wrong.
No fire? No explosions? So whats the point of your story?
Those who are too smart to engage in politics are punished by being governed by those who are dumber. ~Plato
It couldn't be done, but the darn fool didn't know it, and did it anyway.
We all got problems. Ksharp
I like vintage bikes because they take me away from the clutter of technology that I work with everyday and back to a simpler time of mechanical elegance and simplicity.. "ninadm"
Darkwing Duck: The worst part of public transportation is the Public.
"That is awesome shit there" Re-Run
"Fear nothing, attack everything" Eric Berry
" Oh, you read that on the internet? Clearly it IS a massive problem. Of course it CAN’t be normal operation."
1976 CB 750-A X 2
1977 CB 750-A X 4
1977 CB 750-K
1976 CB 750 F
1981 CB 750
1966 Kawasaki SG 250
1981 KZ 750 LTD
1973 CB 350
1979 CM 185 Twinstar
1982 Honda XL 80
South of Eden (Kansas City MO)
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Administrator
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Uhhhhh... NO!  Your best bet would be a rebuildable set $75-125, and rebuild them. Kits are around $60-75, and you will know they are good. $200, and $250 is just too much money to take a chance with. Even if they came off a working bike. How long has it been since it was working? Also it could have been re-jetted, for pods, or exhaust.
TOOLS
P.S. I would rebuild a set, for $100.00 plus parts.
Life is not about the number of breaths, you take, but the moments that take your breath away.
I don't have an anger problem. I have an idiot problem. Hank Hill
Never confuse education for intelligence.
Happiness is a belt fed weapon.
I just can't imagine what could go wrong.
No fire? No explosions? So whats the point of your story?
Those who are too smart to engage in politics are punished by being governed by those who are dumber. ~Plato
It couldn't be done, but the darn fool didn't know it, and did it anyway.
We all got problems. Ksharp
I like vintage bikes because they take me away from the clutter of technology that I work with everyday and back to a simpler time of mechanical elegance and simplicity.. "ninadm"
Darkwing Duck: The worst part of public transportation is the Public.
"That is awesome shit there" Re-Run
"Fear nothing, attack everything" Eric Berry
" Oh, you read that on the internet? Clearly it IS a massive problem. Of course it CAN’t be normal operation."
1976 CB 750-A X 2
1977 CB 750-A X 4
1977 CB 750-K
1976 CB 750 F
1981 CB 750
1966 Kawasaki SG 250
1981 KZ 750 LTD
1973 CB 350
1979 CM 185 Twinstar
1982 Honda XL 80
South of Eden (Kansas City MO)
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Right on, sounds like a plan. Thanks for the help and advice. I'm sure Ill have plenty more questions when I start rebuilding a set lol
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Administrator
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Am i correct in thinking that the carbs are the same between K's and F's? Just different jetting? Also,i am having trouble locating a float mine has a crack in it
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Administrator
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In 77 both the K, and F went to the keyhole carbs. Honda also used the keyhole carbs on the A models.
TOOLS
Life is not about the number of breaths, you take, but the moments that take your breath away.
I don't have an anger problem. I have an idiot problem. Hank Hill
Never confuse education for intelligence.
Happiness is a belt fed weapon.
I just can't imagine what could go wrong.
No fire? No explosions? So whats the point of your story?
Those who are too smart to engage in politics are punished by being governed by those who are dumber. ~Plato
It couldn't be done, but the darn fool didn't know it, and did it anyway.
We all got problems. Ksharp
I like vintage bikes because they take me away from the clutter of technology that I work with everyday and back to a simpler time of mechanical elegance and simplicity.. "ninadm"
Darkwing Duck: The worst part of public transportation is the Public.
"That is awesome shit there" Re-Run
"Fear nothing, attack everything" Eric Berry
" Oh, you read that on the internet? Clearly it IS a massive problem. Of course it CAN’t be normal operation."
1976 CB 750-A X 2
1977 CB 750-A X 4
1977 CB 750-K
1976 CB 750 F
1981 CB 750
1966 Kawasaki SG 250
1981 KZ 750 LTD
1973 CB 350
1979 CM 185 Twinstar
1982 Honda XL 80
South of Eden (Kansas City MO)
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Administrator
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Ok here i am with more questions im hope im not bothering everybody especially you Tools as you seem to straighten me out on most everything haha what is a keyhole carb? if you are referring to the shape of the choke slide(correct name?) mine does kinda resemble a keyhole with a little spring loaded flapper in it
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Administrator
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It's referring to the shape of the top of the carb. There are two types. The round top, and the keyhole. When, you look down at them it is easy to tell which is which.
TOOLS
Life is not about the number of breaths, you take, but the moments that take your breath away.
I don't have an anger problem. I have an idiot problem. Hank Hill
Never confuse education for intelligence.
Happiness is a belt fed weapon.
I just can't imagine what could go wrong.
No fire? No explosions? So whats the point of your story?
Those who are too smart to engage in politics are punished by being governed by those who are dumber. ~Plato
It couldn't be done, but the darn fool didn't know it, and did it anyway.
We all got problems. Ksharp
I like vintage bikes because they take me away from the clutter of technology that I work with everyday and back to a simpler time of mechanical elegance and simplicity.. "ninadm"
Darkwing Duck: The worst part of public transportation is the Public.
"That is awesome shit there" Re-Run
"Fear nothing, attack everything" Eric Berry
" Oh, you read that on the internet? Clearly it IS a massive problem. Of course it CAN’t be normal operation."
1976 CB 750-A X 2
1977 CB 750-A X 4
1977 CB 750-K
1976 CB 750 F
1981 CB 750
1966 Kawasaki SG 250
1981 KZ 750 LTD
1973 CB 350
1979 CM 185 Twinstar
1982 Honda XL 80
South of Eden (Kansas City MO)
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Administrator
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The top that screws ooff and pulls the needle out with it? That hooks to the throttle arms? Mine is round then ,i guess...???
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Administrator
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 Heres what i got.Local bike mechanic said its the wrong ones for my bike????
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Administrator
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Those are round tops, and they will work just fine on your bike. Actually much better then the keyhole carbs.
TOOLS
Life is not about the number of breaths, you take, but the moments that take your breath away.
I don't have an anger problem. I have an idiot problem. Hank Hill
Never confuse education for intelligence.
Happiness is a belt fed weapon.
I just can't imagine what could go wrong.
No fire? No explosions? So whats the point of your story?
Those who are too smart to engage in politics are punished by being governed by those who are dumber. ~Plato
It couldn't be done, but the darn fool didn't know it, and did it anyway.
We all got problems. Ksharp
I like vintage bikes because they take me away from the clutter of technology that I work with everyday and back to a simpler time of mechanical elegance and simplicity.. "ninadm"
Darkwing Duck: The worst part of public transportation is the Public.
"That is awesome shit there" Re-Run
"Fear nothing, attack everything" Eric Berry
" Oh, you read that on the internet? Clearly it IS a massive problem. Of course it CAN’t be normal operation."
1976 CB 750-A X 2
1977 CB 750-A X 4
1977 CB 750-K
1976 CB 750 F
1981 CB 750
1966 Kawasaki SG 250
1981 KZ 750 LTD
1973 CB 350
1979 CM 185 Twinstar
1982 Honda XL 80
South of Eden (Kansas City MO)
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Administrator
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Great news!! Thanks for always helping me out!!! I really appreciate it Tools!
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Or...you could listen to your local mechanic, get different ones, and give me those ones hahahaha
Just an idea 
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Administrator
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Hmmm..let me think about that....  there alot of little differences from the #1 carb to the #4 with the bowl inlets/outlets and the vents i would hate to bo neeeding/looking for just one particular carb My budyy i got my bike from said he has a few other bikes for parts if you tell me what your looking for i will see what he is willing to sell he usaully will sell anything you need all 4 catbs?
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Some of the so called "key hole" style carbs have removable idle jets and some do not.
I would be looking for the ones with the removeable idle jets.
On a Roadstar Adventure.
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