If you choose to accomplish maintenance tasks on your Daelim History 125 then it is usually a good plan to own a Workshop Manual to use as a reference should you want to know the best way to strip off a certain component much like the Exhaust and fit it again correctly.
Daelim History 125 Workshop Manuals provide you with certain diagnostic guides on your car therefore if something is wrong it can help you understand what the problem is and the way to resolve it. You can then determine if this can be achieved yourself or in case the job is simply too big you could make a booking for your History 125 right into a local repair garage.
Daelim History 125 manual