If you have to execute adjustments for your Kreidler Supermoto 250 DD then it will always be recommended to own a Workshop Manual to keep just for a guide should you need to know how you can take out a specific part for example Exhaust and fit it again accordingly.
Kreidler Supermoto 250 DD Workshop Manuals are able to offer detailed diagnostic details with regards to your car so if something is faulty it will help you work out what the issue is and tips on how to correct it. After that you can assess if this can be done by yourself or in case the job is too big you can make a reservation for your Supermoto 250 DD in to a suitable car garage.
Kreidler Supermoto 250 DD manual