Wrist pin wear is not common in the 5hps. If you really think they may be loose, you can check them without dis-assembly. Remove spark plugs and sick a screwdriver in one of the holes. Slowly rotate flywheel while following the piston with the screwdriver (don’t push!!). When the piston is about half way down, stop rotating, then give a push on the screwdriver. Any clunk you feel is slack being taken up by loose wrist pin or con rod bearings. (Should not clunk). Repeat with other piston.