If you wish to execute fixes on your own Yamaha DT50X then it will always be a great idea to possess a Workshop Manual to use as reference just in case you want to know the best way to remove a particular part such as the Gearbox and fit it again correctly.
Yamaha DT50X Workshop Manuals offers clear targeted diagnostic details on your vehicle therefore if something is playing up it helps you figure out what the situation is and the best way to make it better. After that you can evaluate if you can do this on your own or that the job is simply too big you are able to make a booking for your DT50X right into a suitable car garage.
Yamaha DT50X manual