If you choose to conduct fixes for your Yamaha XS 400 Special then it is usually a good plan to own a Workshop Manual to use as personal reference just in case you want to know the right way to strip off a certain component much like the Clutch and fit it again properly.
Yamaha XS 400 Special Workshop Manuals will give you exact diagnostic info for the car so if something is playing up it will help you determine what the situation is and easy methods to resolve it. You will be able to decide if this can be done on your own or that the job is too big you can still make a booking for your XS 400 Special in with a local car garage.
Yamaha XS 400 Special manual