If you want to conduct fixes for your Yamaha XS 650 then it is always a good plan to own a Workshop Manual to keep just for personal reference in case that you want to know easy methods to take off a certain part much like the Drive Shaft and match it again successfully.
Yamaha XS 650 Workshop Manuals will give you exact diagnostic details with regards to your car therefore if something is faulty it helps you identify what the issue is and some ways to resolve it. Then you are able to assess if this can be done yourself or in case the job is simply too big you could book your XS 650 in to a suitable garage.
Yamaha XS 650 manual