If you need to execute repairs for your Yamaha XT 125 X then it is always a good idea to have a Workshop Manual for a guide in the event you need to know techniques to take out a specific component like the Door and match it again in the correct manner.
Yamaha XT 125 X Workshop Manuals gives you exact diagnostic guidelines for the vehicle so if something is not working it helps you work out what the problem is and some ways to fix it. You can then analyse if you can do this by yourself or if ever the job is simply too big you can make a reservation for your XT 125 X into a nearby friendly mechanic.
Yamaha XT 125 X manual