Vintage and Classic Hondas

75 CB750 Tach Oil Seal issue w/Pics!!!

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harsh94blu
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75 CB750 Tach Oil Seal issue w/Pics!!!

harsh94blu
Hello All... Thank you for all your help last post.. although its been a while since i have posted, im hoping to be more active now that i have learned a whole lot of the CB750. I will be posting pics of the build soon.

Im down to finishing the motor, the one on my avatar, but the "Tach Oil Seal" is a bit of a concern. I bought a polished valve cover and tried removing the seal and noticed it was hard so i did something i knew i shouldnt have.. and started banging on the seal from behind to remove it. well it didnt just pop out, there is an extra metal ring in there????

My original valve cover does not have this ring??? So i picked out the seal and its a tiny seal wedged between the valve cover and a metal ring and the seal itself has a little spring type o ring????

the seal that i have for it is a solid piece and it should have just slid right in... now im confused??? anyone have any experience with this? Do i need to get a different seal? does the little metal ring come out? is the cover not really a 75 cover as they stated? Please help... I have included the new and old seal and an angle for you to see that extra ring in the valve cover where the seal meets the tach cable.





Thanks guys!
West Palm Beach, FL
TOOLS1
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Re: 75 CB750 Tach Oil Seal issue w/Pics!!!

TOOLS1
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Sorry, but the only thing I can tell you, is that the seal on the right is a cheaply made seal.
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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)
harsh94blu
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Re: 75 CB750 Tach Oil Seal issue w/Pics!!!

harsh94blu
yea that seal came off of my original valve cover... the seal on the right is what i am questioning??? Why does it look different? Does anyone know much about what i should do with this seal?

West Palm Beach, FL
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Re: 75 CB750 Tach Oil Seal issue w/Pics!!!

TOOLS1
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"why does it look different?" Because it (the seal on the right) is a cheaply made seal. Smear a THIN layer of silicon gasket sealer on the outside of the seal, and shove it down into the hole. Use a deepwell socket to push it down until it seats against the bottom.
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)
harsh94blu
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Re: 75 CB750 Tach Oil Seal issue w/Pics!!!

harsh94blu
Well after a lot of searching and prodding it.. That was the remaining metal part of the seal... I soaked it with WD40 and then banged it out with a punch from the back of the valve cover... It finally came out.. Thanks for the help, the new seal is in and hopefully working as it should!
West Palm Beach, FL
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