If you need to do maintenance tasks to your Aprilia TX 311 M then it is always recommended to have access to a Workshop Manual to use as personal reference should you need to know how to take out a certain part for example, the Brake Discs and install it again in the correct manner.
Aprilia TX 311 M Workshop Manuals can provide unique diagnostic guidelines with regards to your car or truck therefore if something is broken it will help you understand what the situation is and tips on how to correct it. You can then decide if you can do this by yourself or in the event the job is too big you could make a reservation for your TX 311 M right into a trusted repair garage.
Aprilia TX 311 M manual