If you wish to carry out fixes for your Kawasaki Z 900 then it is usually a good plan to own a Workshop Manual to keep just for personal reference in the event you want to know tips to take out a particular part like the Brake Discs and install it again in the correct way.
Kawasaki Z 900 Workshop Manuals can offer you detailed diagnostic information with regards to your vehicle therefore if something is faulty it can help you ascertain what the problem is and tips on how to fix it. After that you can determine if this can be achieved yourself or that the job is just too big it is possible to make a reservation for your Z 900 into a decent mechanic.
Kawasaki Z 900 manual