If you have to conduct maintenance to your Yamaha DT 125 X then it is usually a good plan to possess a Workshop Manual to keep just for personal reference in the event you need to know how you can take out a particular part for example the Wheel and fit it again safely.
Yamaha DT 125 X Workshop Manuals will give specified diagnostic guidelines with regards to your car or truck therefore if something is not working it will help you figure out what the issue is and ways to correct it. After that you can analyse if this can be achieved on your own or in the event the job is just too big you can still book your DT 125 X into a nearby repair garage.
Yamaha DT 125 X manual