If you choose to undertake maintenance on your Sym Wolf 125 Classic then it is usually recommended to have access to a Workshop Manual for reference in case that you need to know easy methods to remove a specific component including Brake Discs and install it again in the correct manner.
Sym Wolf 125 Classic Workshop Manuals are able to offer particular diagnostic information with regards to your vehicle so if something is not working it helps you identify what the situation is and methods to correct it. Then you are able to analyse if this can be achieved by yourself or in case the job is simply too big you can actually make a booking for your Wolf 125 Classic in to a decent mechanic.
Sym Wolf 125 Classic manual