Update- I opened the motor but did not feel up/down clearance in the rod bearings at the crankshaft end (checked by moving the pistons up and down). The rollers and bearing surfaces look excellent.
To check the wrist pin bearings I removed the crankshaft and pushed/pulled by hand on each rod. I did not feel vertical (push/pull) clearance in the wrist pin bearings. I did not remove the pistons to inspect the wrist pin bearings.
I had removed the exhaust cover and plate. And as I moved each piston I could see the rings move in their piston grooves. I could also feel the ring land against the top and bottom of its ring groove as the piston moved up and down. If the piston is moved quickly, the sound was the same as the click I heard when the motor was together. A 0.004 inch flat feeler gage fits in the space between the ring and the piston grooves. A 0.006 feeler does not.
I think I should just put the motor back together but would appreciate if anyone with more experience has any advice.
Thank you.
