Originally Posted by Truckracer

Those are great rings but I've rarely had to replace a stock Sachs based ring. Unless the engine has extremely high time, has been abused or the ring breaks during disassembly which it can if stuck, I try to reuse the original ring if possible. They are pinned and remain mated to the cylinder even after disassembly. If the ring is free on the piston, I don't normally remove it unless necessary. I do check ring gap by sliding the piston back in the cylinder where the gap is visible through the exhaust port. Replacing both rod bearings is usually good practice on these engines any time they are apart unless the engine is low time.