If you wish to do fixes on your Kawasaki ZZR 400 then it will always be a great idea to have access to a Workshop Manual to use as reference in the event you need to know easy methods to take out a specific part for example, the Drive Shaft and match it again perfectly.
Kawasaki ZZR 400 Workshop Manuals offer you precise diagnostic wisdom on your vehicle so if something is faulty it can help you figure out what the situation is and the best way to fix it. Then you are able to determine if this can be achieved on your own or if the job is just too big it is possible to book your ZZR 400 in with a decent mechanic.
Kawasaki ZZR 400 manual