If you have to accomplish maintenance tasks on your own TGB X motion 125 EFI then it is always recommended to have access to a Workshop Manual for a guide in case you need to know proven methods to strip off a certain part for example Gearbox and match it again successfully.
TGB X motion 125 EFI Workshop Manuals offers you exact diagnostic guides for the car so if something is playing up it can help you figure out what the situation is and some ways to repair it. Then you are able to determine if this can be achieved yourself or in case the job is simply too big you can actually make a booking for your X motion 125 EFI into a trusted mechanic.
TGB X motion 125 EFI manual