If you need to accomplish adjustments on your Sachs MadAss 125 then it will always be recommended to have a Workshop Manual to use as personal reference if perhaps you need to know techniques to take out a specific component for example Exhaust and install it again properly.
Sachs MadAss 125 Workshop Manuals are able to offer identifiable diagnostic details with regards to your car so if something is playing up it can help you find out what the situation is and how to correct it. You will be able to determine if you can do this yourself or if the job is too big you are able to book your MadAss 125 right into a local mechanic.
Sachs MadAss 125 manual