Nice find and the bike looks just like the ones we had way back cept ours had polished frames not paint for some reason.
Put you location details in your personal profile, we tend to forget and then you might not get help from someone close by or have as a riding buddy
I still have the RZ500, but got tiered of all the problems (carbs, setup etc). Just getting back into riding and I may find the drive to get the RZ going again .