I tear it down, mic the crank and I use a bore guage to check the conrod. I use a high pressure hot water cleaner to wash the motor and then check the bearings for smoothness and feel if they are loose. I clean the top of the piston and usually polish it up and use a stone and get the top of the sleeve flat. After I talk with the owner about what I feel needs to be replaced if anything I pinch if needed and do what needs to be done and ship it out.

Rex