If you need to accomplish maintenance to your Yamaha TT R125LE then it is usually a good plan to have access to a Workshop Manual to keep just for a guide in case you want to know ways to take off a specific component for example, the Exhaust and fit it again in the correct way.
Yamaha TT R125LE Workshop Manuals gives you precise diagnostic guidelines for the car so if something is faulty it can help you work out what the issue is and how you can correct it. Then you are able to assess if this can be achieved on your own or if the job is just too big it is possible to make a booking for your TT R125LE right into a suitable car garage.
Yamaha TT R125LE manual