No eBay APP ID and/or Cert ID defined in Kunena configurationNo eBay APP ID and/or Cert ID defined in Kunena configurationNo eBay APP ID and/or Cert ID defined in Kunena configurationNo eBay APP ID and/or Cert ID defined in Kunena configurationWelcome. And congratulations on finding such a cool bike (I might be a bit biased towards the Z1R).
The first step should be to get a factory service manual. The Kawasaki manuals are very detailed and also very well written. They cover the theory of operation for most of the bike systems as well, which is uncommon these days.
The back of the manual should say 1980 KZ1000-D3, but it wouldn't show that model on the cover. There are probably three or so different versions that cover this bike. Here are some examples: