If you want to perform maintenance for your Yamaha YB 1 Four then it is usually a good idea to have access to a Workshop Manual to keep just for personal reference in the event that you want to know techniques to strip off a certain part for instance the Exhaust and install it again the right way.
Yamaha YB 1 Four Workshop Manuals provides exact diagnostic facts with regards to your vehicle therefore if something is not working it helps you figure out what the situation is and some ways to make it better. You can then decide if this can be achieved on your own or that the job is too big it is possible to make a reservation for your YB 1 Four in to a trusted garage.
Yamaha YB 1 Four manual