Front master cylinder

Can anyone help me identify this M/C? I put it on when I did the duel disks back in the 80's. It was in a box with spare parts so I don't know what bike it came from. It said Kawasaki on the cover, installed it after I did the duel disk set up. I bought a diaphragm, but the one I bought is too small. The new one is for a KZP, Specter, etc.
Steve