If you want to execute maintenance for your Sym Orbit 125 then it is always a good idea to own a Workshop Manual to use as a reference should you need to know the best way to take out a certain component for instance the Clutch and match it again adequately.
Sym Orbit 125 Workshop Manuals can provide exact diagnostic details on your automobile so if something is playing up it will help you understand what the problem is and how to resolve it. After that you can decide if you can do this by yourself or if the job is simply too big you are able to book your Orbit 125 into a decent car garage.
Sym Orbit 125 manual