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Hi guys
I am quiet new on the motorcycle scene, I've had a few bikes over the years and know the basics of maintenance. I have just purchased a 1983 cb 750 for basically nothing! It's not the best looking bike by far but I can see huge potential in her ;-) she runs besides been stood since 1999!!! And has covered 32k miles.
Where should I start regarding finding out what state the engine is in? I don't want to spend hard earnt cash then realise I bought a dog... I can do some stuff with help from a Haynes manual but engine wise I'm a rookie lol.
My first thought was cafe racer and then I saw a picture one of your members posted on another post
 I need to keep a level head and get some good foundations sorted (the engine) and then I can let my imagenation run wild  Look forward to your replies
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Administrator
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What do you think is wrong with the engine? You said it runs, does it run poorly? The only part of an engine that would be affected by age would be some gaskets, and seals. And the carburators often get gummed up from sitting.
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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Hi tools
Thanks for your reply, then engine actually sounded okay when I viewed the bike but I know the carbs definitely need a good clean etc and setting up. I've took off the carbs and tank etc to clean as its been stood so long I don't know how long previous petrol has been in there!
Would you advise me to open up the old beast? If so what should I replace? I don't want to end up over my head if you get me?
Thanks again
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Administrator
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I would clean the carbs, change the oil, and do a tune up. Then I would ride the crap out of 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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Administrator
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You might do a compression test. That will tell you if the rings and valves are in good shape. If so, you should be good aside from maybe gaskets.
The ride IS the adventure. The destination is just to get gas!
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Your photo doesn't show any air box (air filter). Do you have it? You will find it difficult to get it to run propperly without it, as the CD or CV type carburettors need some restriction to operate as they were designed to.
1982 CB750F
1978 Triumph Tiger 750
197? Yamaha DT175
197? Hodaka ACE 100
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Hi
Yeah I do have the airbox but I think I'll need new rubbers they have not aged to well. Would I be best off buying a full gasket set for the engine to be on the safe side??
Cheers guys :)
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Administrator
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You can often get a full gasket set cheaper then buying a few gaskets piecemeal.
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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TOOLS would it be best to drain the current oil, put in some more oil and run it for half hour then if I drained it would that get any crap out of there? Then obviously put some good oil in?? Which oil would you recommend??
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Administrator
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Unless the engine has been submerged in something, or someone has put something other then oil in, just change it. However I am Sarg will be along to sing the praises of Seafoam soon.  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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Tools I have a question for you the number on my engine is RC04E-2217814 and the number on my frame is RC04-2211963 do you know anything about these? I can't find anything on google just want to know whether its the right engine/frame
Cheers in advance
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Administrator
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Seems right to me. The numbers never matched.
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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Like these guys said, change the fluids, if you want to run a compression check on all 4
cylinders to make sure one or 2 aren't in line, that's cool too. Maybe pull up a thread
on checking cam chain tensions. Besides that, reinstall that airbox and run a tank or 2 of 93 octane
thru it, and ride it.
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