If you wish to accomplish repairs on your own Hercules K 125 then it is usually a great idea to own a Workshop Manual to use as personal reference in the event you need to know the best ways to strip off a particular part for instance the Clutch and match it again in the right way.
Hercules K 125 Workshop Manuals can provide identifiable diagnostic details for your car therefore if something is playing up it can help you understand what the situation is and easy methods to repair it. You can then analyse if you can do this on your own or in the event the job is simply too big you can still make a reservation for your K 125 in with a nearby car garage.
Hercules K 125 manual