You are right, the best retro 80s Bike. And it is surprisingly a real head turner.
I was member of the ZRXOA, but i cant log in any more. My mails get unanswered. My screen name was "Bavarian ZRX" back then.
Mods? Just a little bit. Factory Jet kit and shifter kit, BOS muffler, wider and lower handlebar, Mr. KWICK Starter chain tenioner fix, throttle grip, 4° advanced ignition rotor. Selfmade tip-over switch. OEM brake discs modified with aftermarket floater to full floating. Clutch lever bearing changed from brass bushing to tiny ball bearings from a RC car. I have problemes with my "Synoviual tendon sheats", this helps a lot.
I hab bad luck and a accident 2 years ago, my first accident since 1992. All my fault. My almost new ZRX flipped over in the meadows. Destroyed beyond financial reasonable repair. I get hold of a heavy used ZRX, cheap. I disassembled both bikes and then build a new ZRX out of the best parts of both.
This was fun, you start with a frame with a fork in it and pick the best parts out of the shelf... Swingarm, engine, Shocks.... Wrenching slowly over the winter and you end up with a bike better than new.
And i finally get my much beloved Green-blue-white colour sheme.
"In everything bad is something good" as we say here.