If you need to do auto repairs on your Hercules K 125 S then it is always a good idea to have a Workshop Manual for personal reference in case you want to know tips on how to strip off a certain part much like the Drive Shaft and match it again in the correct manner.
Hercules K 125 S Workshop Manuals offers clear particular diagnostic information for the vehicle so if something is not working it can help you discover what the problem is and easy methods to make it better. You can then determine if you can do this yourself or that the job is simply too big it is possible to book your K 125 S in with a suitable garage.
Hercules K 125 S manual