If you have to undertake maintenance tasks for your Piaggio XEvo 400 then it will always be a good plan to own a Workshop Manual to keep just for reference should you want to know the way to strip off a certain component like the Wheel Bearing and match it again in the right way.
Piaggio XEvo 400 Workshop Manuals gives you certain diagnostic guides on your car therefore if something is faulty it can help you determine what the issue is and easy methods to resolve it. You can then decide if this can be achieved by yourself or if the job is just too big it is possible to make a booking for your XEvo 400 in with a trusted car garage.
Piaggio XEvo 400 manual