Well they used Circlips on the wrist pin so it won't be a problem. Now if the piston isn't pinned to lock the ring into one position, then the ring is free to move around until it seats itself.
So unless they made the crankcase too small for the transfer port passages, then rotating the cylinder/head should not be a problem. Now a limiting factor might be if the piston is asymmetrical and has longer skirt on one side or the other. Then it would need a side exhaust versus rear exhaust piston.