Kawasaki model FD620 crankshaft specs needed

Doing a rebuild due to oil consumption. Don't know what the rod journal specs should be on this engine and no luck finding it so far. It wasn't knocking but if it needs attention now's the time to do it. This is a fuel injected engine, out of a John Deere 445 lawn tractor but don't know if there's any difference in the models. I suspect not. Any help appreciated.