Z50, CT70, ST90, CT90/110...along with some other models can use the same brake shoes. The major differences between brake plates, most notably Z50 & CT70 are the external details. For example, the CT70 rear has a partial flange, and an extended mount for the brake stay...whereas the early Z50 versions lack those details. There's more to it than that. The point is that you'd need to either verify PNs, compare them side-by-side, or attempt to install one on your bike to see if they can be swapped, without mods.