If you need to accomplish fixes for your Yamaha TT R 125 LW then it is usually a good idea to own a Workshop Manual for a guide just in case you need to know the best ways to take out a specific part including Dashboard and match it again in the correct way.
Yamaha TT R 125 LW Workshop Manuals can provide precise diagnostic guidelines for the vehicle so if something is faulty it helps you determine what the issue is and ways to fix it. Then you are able to evaluate if this can be done yourself or if the job is too big you could make a booking for your TT R 125 LW in to a decent garage.
Yamaha TT R 125 LW manual