She is back home! I found this bike a few years ago in a wooden bavarian pigbarn where she been stored away over 30 years with just 2.800 KMs on the clock and registered only for a few months since new. I have a listing from her here on my site with pictures.
I sold her to a good customer and he enjoyed her a few years and made aproxm. 6.000 KMs without any hassles. I got her back now as partexchange and now she's available again for a loving owner. Z500/550's get superrare, far rarer than her big sister the legendary Z1R! And this bike is unrestored beside I put a more fancy paintset on her instead her boring original silver.
Even the original invoice from 1984 is there!