If you choose to execute repairs to your Kawasaki KFX 450R then it will always be a great idea to have a Workshop Manual to keep just for a guide if you want to know the right way to take out a certain part for example Brake Discs and install it again properly.
Kawasaki KFX 450R Workshop Manuals will provide you with identifiable diagnostic info on your vehicle so if something is faulty it helps you identify what the situation is and easy methods to repair it. You will be able to evaluate if this can be done by yourself or in case the job is simply too big you can make a reservation for your KFX 450R into a decent mechanic.
Kawasaki KFX 450R manual