If you choose to do adjustments on your own Kawasaki Z 750 GT then it is always a good idea to have a Workshop Manual to use as personal reference in the event you need to know the best ways to strip off a specific component for instance the Brake Discs and match it again correctly.
Kawasaki Z 750 GT Workshop Manuals can provide particular diagnostic guides for the vehicle therefore if something is playing up it can help you find out what the problem is and ways to resolve it. You can then decide if this can be achieved on your own or if the job is too big you could book your Z 750 GT in to a decent repair garage.
Kawasaki Z 750 GT manual