If you choose to do maintenance for your Yamaha RD 350 F then it is usually a good idea to own a Workshop Manual to keep just for a reference if perhaps you want to know how to take off a specific component for instance the Drive Shaft and install it again perfectly.
Yamaha RD 350 F Workshop Manuals offers you special diagnostic guidelines for the car or truck therefore if something is wrong it will help you determine what the situation is and easy methods to make it better. You will be able to assess if this can be achieved on your own or if the job is too big you can actually book your RD 350 F into a decent repair garage.
Yamaha RD 350 F manual