<LOL> You should try the OEM brakes on the 86-93 model bikes.
Mine has Nissin 4 pots from a CBR900XX with Chinese discs/rotors and stops almost as well as the 1400.
I got the adapters from Russell "enim57" on this forum but he only does them for the 86-93 ZG1000.
I though someone on here did brackets for the 94- to fit Tokico or Nissin calipers.
I know ZRXMopar used to do them but he can't any more. Anyone else??
May be on the other forum though. I'll take a look.
2Fast does a bracket for Tokico calipers but also requires a 320mm disc/rotor upgrade and some machining.