If you need to carry out adjustments on your Piaggio Fly 50 4T then it is usually recommended to possess a Workshop Manual to use as reference in the event that you need to know tips on how to take off a specific component much like the Wheel Bearing and install it again efficiently.
Piaggio Fly 50 4T Workshop Manuals can provide certain diagnostic guidelines for the vehicle so if something is playing up it will help you find out what the situation is and tips on how to repair it. You will be able to determine if you can do this by yourself or that the job is just too big you could make a booking for your Fly 50 4T in with a local garage.
Piaggio Fly 50 4T manual