If you choose to perform auto repairs on your own Yamaha FZR 250 then it is usually a good idea to have access to a Workshop Manual for a guide should you need to know the right way to remove a certain component for example, the Wheel Bearing and install it again properly.
Yamaha FZR 250 Workshop Manuals will provide you with specified diagnostic information for the car therefore if something is wrong it will help you figure out what the situation is and some ways to repair it. Then you are able to decide if this can be done by yourself or in case the job is too big you can actually book your FZR 250 in to a nearby car garage.
Yamaha FZR 250 manual