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Administrator
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This post was updated on .
I have an early Comstar that came off of a 76 F.It was not original to the bike,but it did line up correctly. I need it to line up on a 78K. The later model engine has a different front sprocket location than the earlier ones. Approximately 10mm ,or 3/8'', out board compared to the earlier models.
Also,from what I can tell, spoke wheels and Comstars use different cush drives/sprocket carriers. The 4 stud version on the left is from a spoke wheel and the 5 stud version on the right is from a Comstar.
  Comstar hub
 Spoke hub
 Anyone have any insight on this? Thanks
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Administrator
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You know, I can fix this problem!
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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I'm sure you can,but your solutions always cost me money   Pat,I'm trying to run a Comstar.
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ah I see..i dont have one.
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lol..so bord..just sitting at work.in my truck..
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Administrator
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go practice your engraving  Youre at work at 11pm?!that sucks
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Administrator
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What he needed was a wheel to go with the cush drive that fit his oddball engine. 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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Ooohhhh I see that now.
So he Has an earlier frame and stuck a 78K motor into it, is that it? now the sprockets won't line up?
If that is the case, then the swingarm and axle assembly from an f2 should re-align everything.
Am I still missing something?
The ride IS the adventure. The destination is just to get gas!
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Administrator
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Yes you are. The swingarm's all have the same dimensions, so that's not the problem. The wheel he has works with a 69-76 engine, so he got a cush drive, for a 77-78 engine/wheel combo. However it turns out that he has an oddball wheel with a five fingered cush drive. Don't know what model/year it is. What he needs now is a wheel to fit the correct cush drive he does have.
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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Best I can tell,DOHC 750 bikes have the 5 fingered drive.Also 650 DOHC and SOHC 500 and 550 all use the 5 stud setup. Basically,every CB other than a SOHC 750 uses the 5 stud.Go figure.
Money on it's way BRO
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your spokes are orange.
With my opinion and your knowledge, we can change the world.
KEEP YOUR FISTS UP, FOR BALANCE AND PROTECTION!!!
i like fat chicks
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Administrator
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shinyribs wrote
Best I can tell,DOHC 750 bikes have the 5 fingered drive.Also 650 DOHC and SOHC 500 and 550 all use the 5 stud setup. Basically,every CB other than a SOHC 750 uses the 5 stud.Go figure.
Money on it's way BRO
Your wrong. The DOHC 750's use the 4 finger.
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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Well actually, the 77/78K has a wider swingarm then the earlier years. I think the 2/3 might as well but I know the K does. They use wider tires too and can fit a larger tire.
So because of this, offsets are different after 76.
The ride IS the adventure. The destination is just to get gas!
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Administrator
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The swing arms are wider on those bikes,but thats not why it needs the offset cush drive. All of the rear wheels are centered in the bike regardless of tire width. The primary sprocket sticks out further on the 77/78 bikes. No idea why,they just do.
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Administrator
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TOOLS1 wrote
shinyribs wrote
Best I can tell,DOHC 750 bikes have the 5 fingered drive.Also 650 DOHC and SOHC 500 and 550 all use the 5 stud setup. Basically,every CB other than a SOHC 750 uses the 5 stud.Go figure.
Money on it's way BRO
Your wrong. The DOHC 750's use the 4 finger.
TOOLS
Hmmmm.The plot thickens...That why I like to say "best I can tell". Some many differences,so little brain for me to figure it out. 
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Administrator
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Have you checked the hub? The hub might be thicker, after all the rim on the 77/78k is wider. That would be about the only place I could see the change. I suppose the cush drive plate could be more conical.
I know cyclex makes an offset sprocket but that doesn't help your cush issue much.
The ride IS the adventure. The destination is just to get gas!
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