If you need to execute maintenance tasks to your Aprilia TX 311 M then it will always be a good idea to have a Workshop Manual to keep just for personal reference should you want to know the right way to take out a particular component including Dashboard and install it again appropriately.
Aprilia TX 311 M Workshop Manuals are able to offer specific diagnostic facts for your vehicle so if something is not working it can help you identify what the problem is and the way to make it better. You can then analyse if this can be done yourself or that the job is just too big you can book your TX 311 M right into a suitable mechanic.
Aprilia TX 311 M manual