Vintage and Classic Hondas

Top End Knock

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dgreenbluet
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Top End Knock

dgreenbluet
So Im new to the CB 750 world and I dont know a whole lot about the bike.  What i do know is that i love the way they look and im in the market to buy one.  I found a 78 CB 750 on craigslist that is 3 hours away from me for $600 but it has what the owner calls a "top end knock".  My question is could this just be valves out of adjustment?  I havent heard the bike myself but plan to on Wednesday, so maybe I could upload a video of it running to the thread.  It is the DOHC engine.  Not sure on miles???  The ad also says it comes with a spare engine that has bottom end damage but who really knows until you get it torn apart.  Here's a link to the craigslist ad Click Here  Let me know what you think.  Thanks

Also did they make 78's with the DOHC?  According to wikipedia(i know) the DOHC came out in 79?  Kinda strange.
TOOLS1
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Re: Top End Knock

TOOLS1
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With out hearing it it is hard to tell. However it is common, for these bikes to sound like they have a knock when the carbs need synced. $600.00 does not seem to bad. These bikes usually go, for around $1000.00-$1800.00.
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)
dgreenbluet
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Re: Top End Knock

dgreenbluet
In reply to this post by dgreenbluet
Just got an email from the seller, its got 26950 miles on it.  He said he would have to rig up a gas tank to get it started??? Not sure what that means but doesnt sound good.  Maybe the tank on it is rusted inside???  
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Re: Top End Knock

TOOLS1
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Sounds like it. I would offer $300.00, for it.
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)
Peterwh
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Re: Top End Knock

Peterwh
It is definitely odd that he says it's a 1978 DOHC. Because, as you rightly say, the DOHC did not come out until 1979. I would say it has to be either a 1979 or later, or a SOHC
dgreenbluet
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Re: Top End Knock

dgreenbluet
Yeah definitely a DOHC engine in the pic.  Wonder if he has a title in hand, that should clear things up alittle.
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Re: Top End Knock

TOOLS1
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I would ask if he has a title before going to look at it.
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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