If you want to carry out adjustments for your TGB R125X then it is always a good idea to have access to a Workshop Manual to keep just for personal reference in case that you want to know the best way to take out a specific component for example Clutch and fit it again perfectly.
TGB R125X Workshop Manuals are able to offer detailed diagnostic info on your car therefore if something is faulty it helps you ascertain what the problem is and how to make it better. After that you can analyse if this can be achieved by yourself or if ever the job is too big you can actually make a booking for your R125X right into a decent car garage.
TGB R125X manual