If you have to perform repairs on your own Gilera XR1 125 then it will always be a good idea to possess a Workshop Manual to keep just for reference in the event that you need to know ways to remove a specific component for instance the Door and match it again in the correct way.
Gilera XR1 125 Workshop Manuals gives you special diagnostic info with regards to your vehicle therefore if something is not working it can help you work out what the problem is and methods to correct it. You will be able to evaluate if this can be done yourself or in case the job is just too big you can actually book your XR1 125 in with a nearby mechanic.
Gilera XR1 125 manual