If you need to execute adjustments for your Sachs XTC R 125 then it is usually a good idea to own a Workshop Manual to use as personal reference in case you need to know the right way to remove a certain part for example, the Exhaust and fit it again in the correct way.
Sachs XTC R 125 Workshop Manuals will give you certain diagnostic facts with regards to your car or truck so if something is wrong it helps you determine what the problem is and how you can resolve it. After that you can determine if this can be achieved by yourself or if ever the job is too big you are able to book your XTC R 125 right into a suitable mechanic.
Sachs XTC R 125 manual