If you want to conduct maintenance on your own Sachs SpeedForce 50 then it is always recommended to have access to a Workshop Manual to use as reference in the event you need to know simple methods to take off a particular part much like the Clutch and fit it again appropriately.
Sachs SpeedForce 50 Workshop Manuals can offer you targeted diagnostic guidelines on your car therefore if something is broken it will help you understand what the situation is and how you can resolve it. You can then analyse if you can do this on your own or if ever the job is just too big you are able to book your SpeedForce 50 in with a decent mechanic.
Sachs SpeedForce 50 manual