If you want to undertake maintenance tasks to your Moto Guzzi 254 then it is usually a good plan to have access to a Workshop Manual for personal reference in case you want to know simple methods to strip off a specific part much like the Brake Pads and fit it again accordingly.
Moto Guzzi 254 Workshop Manuals offer you certain diagnostic information with regards to your vehicle so if something is wrong it will help you discover what the issue is and methods to make it better. You will be able to analyse if this can be done by yourself or in case the job is simply too big you can actually book your 254 in with a trusted friendly mechanic.
Moto Guzzi 254 manual