If you want to execute repairs on your Bajaj KB 125 then it is usually a great idea to possess a Workshop Manual to keep just for personal reference if you need to know the right way to remove a certain part such as the Brake Pads and fit it again appropriately.
Bajaj KB 125 Workshop Manuals offer you identifiable diagnostic info on your automobile so if something is faulty it can help you identify what the situation is and easy methods to correct it. You can then evaluate if this can be done yourself or if the job is simply too big you can actually make a booking for your KB 125 in with a suitable friendly mechanic.
Bajaj KB 125 manual