If you wish to do maintenance on your Yamaha RX135 then it is usually a great idea to have access to a Workshop Manual for a guide in case you need to know tips to remove a certain part much like the Brake Discs and fit it again in the correct manner.
Yamaha RX135 Workshop Manuals provide you with distinct diagnostic wisdom on your car therefore if something is faulty it can help you determine what the situation is and the way to resolve it. After that you can evaluate if this can be achieved on your own or in the event the job is too big you are able to make a reservation for your RX135 in with a nearby friendly mechanic.
Yamaha RX135 manual