Leaking oil from muffler/cylinder head connection

[Ranch120]

Good evening everyone,

One of my CT70's leaks a bit of oil from the insertion point of the muffler exhaust and the front cylinder head. It of course smokes a little when the oil touches the exhaust when riding. I have retightened the two bolts that connect the exhaust into the cylinder head housing and it reduced the amount of oil leaking out a bunch, probably about 75% or so reduction. I am thinking I need to replace the gasket that fits into the cylinder head. Is there anything else I should be looking for, or doing, while I am working on this? Thanks for your help.

[knucklebuster2]

theres also a quad ring on the head that seals oil to the head,cylinder

[hornetgod]

The original exhausts have two half moon spacers that go between the collar and cylinder head. You have those installed? Did you use a new crush gasket? Did you check your valve lash gaps? If it's leaking that much oil, odds are your piston rings are pretty worn. Have you done a compression check?

[Ranch120]

My compression is real good and the engine starts and runs good also. These spacers you mention, are they external of the cylinder head?

[XSIVE]

They fit up inside the exhaust port. Here is a diagram. They are part number 1.

http://us.st12.yimg.com/us.st.yimg.c...2034_109961392

[hornetgod]

Originally Posted by XSIVE

They fit up inside the exhaust port. Here is a diagram. They are part number 1.

http://us.st12.yimg.com/us.st.yimg.c...2034_109961392

"XSIVE" hit the nail on the head. Item #1 in the diagram is exactally what I was describing. Also make sure you have a new crush washer (item #
5)

Let me know if you need help finding these. I have a couple places I buy stock parts online.