Yes I didn't explain enough, The top image above shows carbon found under the inlet valve head, in the port. Does this mean the inlet valve was leaking?
The 2nd image above shows underneath the exhaust valve head, you can see where the muffler screws in. It has a broken casting at the front of the valve guide. I think it will be fine.
I have honed the bore, this is how it came up.
![[Linked Image]](https://www.outdoorking-forum.com.au/forum/uploads/usergals/2014/11/full-4730-18313-wp_20141106_015.jpg)
I buffed the scoring on the piston on my buffing wheel, not to get rid of the scratches, but to smooth them out.
My ring end gap for the compression ring was 0.8mm.
I am putting it back together with the existing rings. I know it is far from perfect.