If you have to perform adjustments on your Honda XR 125 then it is usually a good idea to possess a Workshop Manual to use as personal reference if perhaps you want to know how you can take off a particular part much like the Wheel Bearing and fit it again in the correct manner.
Honda XR 125 Workshop Manuals are able to offer precise diagnostic info for your automobile so if something is wrong it helps you find out what the issue is and methods to make it better. You can then evaluate if this can be done yourself or in the event the job is just too big you can actually make a reservation for your XR 125 into a suitable garage.
Honda XR 125 manual