125cc. Upper cam chain guide not good? By gingel (Read 241 times)

[gingel]

Hi,

For quite some time, i noticed that the cam chain has too much free play to the sides,
on the camshaft.
I did a rebuild to the engine about 14k miles ago, and i replaced the cam chain and tensioner.

I tried to replace the tensioner again with a new one, but same problem.
When i took off the tensioner, i did notice that on the cam chain guide,
there is a small dent where the tensioner is pushing against the cam chain upper guide.

Tried to make a photo but it's hard to see inside, so i found an old post of
someone here which had the same thing with the cam chain guide, and he took a photo with
the engine head off, so you can see it better. This is the post where he published the photo.



Is this dent can cause the cam chain not to be tensioned enough?

Thank you.

[cyborg]

Yes if the follower is severely worn like the one in the pic ,, that would affect adjustment

[gingel]

Thank you for the answer.
Is it possible to replace the upper guide without removing the engine head?

[cyborg]

Check the library,,,there should be a video,,,but I do believe the head and barrel need to be removed

[gingel]

I watched some videos, and do you think that it may be possible to remove the
upper guide with only removing the camshaft?

When you open the 4 head nuts, but not moving the head itself, the gasket itself stay ok?
Or once you open the head nuts, that's it, you have to replace the head gasket?

[cyborg]

I've reclamped head gaskets with little trouble