If you wish to conduct auto repairs to your Kawasaki GPZ 305 then it will always be a good idea to own a Workshop Manual to use as a reference in case you want to know the best way to strip off a certain part much like the Brake Discs and match it again the right way.
Kawasaki GPZ 305 Workshop Manuals offers you detailed diagnostic details for your vehicle therefore if something is wrong it will help you figure out what the situation is and ways to fix it. After that you can analyse if this can be done yourself or if ever the job is just too big you could book your GPZ 305 in to a suitable repair garage.
Kawasaki GPZ 305 manual