If you want to undertake maintenance on your own Kawasaki Ninja 500R then it will always be a good plan to own a Workshop Manual to use as a guide in the event that you want to know the right way to remove a certain component including Gearbox and fit it again correctly.
Kawasaki Ninja 500R Workshop Manuals can offer you targeted diagnostic info on your car or truck therefore if something is playing up it will help you work out what the problem is and some ways to fix it. Then you are able to determine if you can do this by yourself or in the event the job is too big it is possible to make a reservation for your Ninja 500R in to a local car garage.
Kawasaki Ninja 500R manual