If you choose to perform maintenance tasks on your Kawasaki ZZ R 500 then it will always be a good plan to have a Workshop Manual to keep just for a reference in case that you need to know tips to strip off a certain part much like the Gearbox and fit it again accurately.
Kawasaki ZZ R 500 Workshop Manuals can provide specific diagnostic information with regards to your automobile so if something is faulty it helps you ascertain what the problem is and how to correct it. You can then decide if this can be done yourself or if the job is too big it is possible to book your ZZ R 500 into a nearby garage.
Kawasaki ZZ R 500 manual