1968 ct90 smoker

classic Classic list List threaded Threaded
2 messages Options
Reply | Threaded
Open this post in threaded view

1968 ct90 smoker

I have a ct90 that is smoking, burning oil.  Are there any valve seals on the valves on these ct90?  I have a 1968 and a 1970 and they both smoke, burn oil.  From the head gasket set it looks like there are no valve seals like on other Honda engines, looks like just an O ring.  Any suggestions???

Reply | Threaded
Open this post in threaded view

Re: 1968 ct90 smoker

Some did, some did not. Check put this parts diagram.
With a leaking valve guide seal, the engine will just puff some smoke on startup. If it is smoking all the time you need a rebuild. Bore cylinder with new piston and rings and a valve job maybe requiring new valves and guides. I do machine shop work specializing in motorcycle engines, if you need it done please contact me,
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)