I just went through this, melted a hole in a piston and scored the cylinder wall...i dunno, surely previous owner lmao
I decided to work on the cylinder sleeve.
I'll reveal the before and after later.D
My original plan was to hone the cylinder smooth or bore it .5 over and get a 67.5mm piston...
But then I found out about these coated cylinder walls and realized that honing or boring wasn't really the best option.
I ended up buying a used case ($150) & a used piston ($30) on ebay.
Plus new rod bolts ($55) & a couple gaskets and rebuilt the whole thing for about $400 myself if you have the time and patience 👍
The bottom case is the old one and the 2nd hole from the left was the one I honed before I changed my mind
