If you wish to carry out maintenance tasks for your Yamaha XS 400 SE then it is always a good plan to have a Workshop Manual for a guide if you need to know the best ways to take out a certain component such as the Brake Pads and install it again effectively.
Yamaha XS 400 SE Workshop Manuals offer you certain diagnostic info on your car therefore if something is faulty it can help you work out what the problem is and the way to make it better. After that you can evaluate if you can do this by yourself or if ever the job is too big you can book your XS 400 SE in with a trusted repair garage.
Yamaha XS 400 SE manual