Thanks Mark that was the same one I was looking at. Will do some more reading on the concept and probably purchase one.

Ok, I have done a little more research on splitting the case and it appears worthwhile. I have found a full set of rings (including the oil ring) for $12 delivered that's if I find the oil ring is damaged.

This is a GXV120 motor and unless I am completely mistaken I'll need to crack the case, undo the rod bolts and slide the piston out. I have watched several similar video's on u tube but I am after a few pointers before I commence this task.

I'd like to specifically know what to watch out for and some pointers to make sure I execute the project correctly.

I know to carefully:
Look for the timing marks and use a marker to ensure they line up if timing marks are not present
Put a mark on the piston to ensure it is re-inserted into the bore the correct way
Torque the rod bolts correctly

What I need to confirm is?

Do I need to hone the bore similar to inserted new rings on a 2 stroke given this one has minimal wear?
The recommended torque specs for the rod bolts and the case when I re-seal it with RTV silicon. Well at least a recommendation based on experience would be greatly appreciated.

Any other pointers would be appreciated.

Thank you