If you wish to perform adjustments on your Yamaha FZ1 then it is usually recommended to have a Workshop Manual to use as reference if you need to know the best way to take off a specific component for instance the Brake Pads and fit it again safely.
Yamaha FZ1 Workshop Manuals offers clear distinct diagnostic guides for your car or truck therefore if something is wrong it can help you identify what the problem is and the way to make it better. You will be able to analyse if this can be achieved by yourself or in case the job is too big you can make a reservation for your FZ1 right into a decent friendly mechanic.
Yamaha FZ1 manual