Make sure you know what you're lookin for. Early Z50's used 3 different versions of stator covers. Then in the 90's they went to the 4th (12v).
You want the 2nd version from late K1's and K2's. Has a little beveled edge along the bottom in the area of the sprocket.
Hi Z50nut
Glad to see that you're back to working on your soft tail. I've looked at several soft tails and only seen a bevel edge side cover on 1. That was a 74, which I know is not correct. Based on the parts list I have, there was a change on the side cover starting with the K3 soft tail (1972). I think it's safe bet that your 73 does not use a bevel edge side cover.