If you have to accomplish fixes on your own Sym RV1 then it will always be a good idea to possess a Workshop Manual for a guide in the event you want to know methods to take out a particular component like the Brake Discs and install it again in the correct way.
Sym RV1 Workshop Manuals are able to offer exact diagnostic info for the car so if something is not working it will help you identify what the problem is and tips on how to correct it. You will be able to evaluate if you can do this yourself or that the job is too big you can still book your RV1 into a local repair garage.
Sym RV1 manual