wheel Axle diameter on Z500 -81

Hi!

I am trying to find a new set of rims form my Z500, and found a guy selling a GPz750-82 in parts.
The question is now... Is there anyone here who knows what diameter the axles on the Z500 B3 -81 is? And/Or will the rims from the GPz750 simply fit bolt on without any modifications?

I would go straight to the garage and measure the axles if I could, but unfortunately I am out of town for 2 days...
Hope you guys can help me!

Best regards
/Rickard

Edit:
This is the thought out GPz750 donator...
cdn.blocket.com/static/1/images_full/55/5560622991.jpg

Sorry,I cant find it. I had a link to a site that listed these things (exhaustivley) but I cant find it. Im sure someone else here can point you to it.
Good luck.