If you choose to undertake maintenance tasks for your Honda CBR125R then it is always a great idea to have access to a Workshop Manual to keep just for a reference in the event that you need to know tips on how to take off a specific component like the Wheel Bearing and fit it again the right way.
Honda CBR125R Workshop Manuals provides specific diagnostic information for the car or truck so if something is playing up it will help you ascertain what the issue is and tips to correct it. You can then assess if you can do this by yourself or in case the job is too big you can actually make a reservation for your CBR125R right into a nearby friendly mechanic.
Honda CBR125R manual