If you wish to execute repairs to your Yamaha RD 250 then it will always be a good idea to have a Workshop Manual to keep just for a guide in the event that you want to know tips on how to take out a certain part for example, the Brake Pads and match it again in the right way.
Yamaha RD 250 Workshop Manuals will give you certain diagnostic guides for your automobile so if something is playing up it can help you identify what the situation is and ways to correct it. You can then determine if this can be done yourself or in the event the job is just too big you are able to book your RD 250 right into a decent garage.
Yamaha RD 250 manual