If you wish to execute auto repairs for your Aprilia SR 50 R then it is always a great idea to have a Workshop Manual to use as personal reference in the event that you need to know ways to take out a particular part like the Wheel and install it again the right way.
Aprilia SR 50 R Workshop Manuals will provide you with identifiable diagnostic guides with regards to your automobile so if something is not working it will help you find out what the issue is and methods to fix it. You can then evaluate if this can be done by yourself or if ever the job is just too big you can actually book your SR 50 R into a nearby garage.
Aprilia SR 50 R manual