I used my inside micrometer to measure the cylinder bore at the top 1/8", where the rings don't wear the walls. It's no wonder this engine always sounded so loose. I only measured the middle two, but #2 was .028" over standard and #3 was .022" over standard, while the pistons are marked .015" over standard.
No chance of locking this one up on an overheat.
Sure hope the bottom was done with more accuracy than the top.
