If you wish to execute auto repairs on your own Yamaha Black X Max 125 then it is always a good plan to have a Workshop Manual to keep just for a reference in the event that you need to know tips on how to strip off a specific component for example, the Gearbox and install it again accordingly.
Yamaha Black X Max 125 Workshop Manuals provide you with distinct diagnostic information for the vehicle so if something is broken it can help you find out what the problem is and the best way to resolve it. Then you are able to analyse if you can do this yourself or if the job is too big you are able to make a booking for your Black X Max 125 in with a trusted garage.
Yamaha Black X Max 125 manual