If you choose to perform adjustments to your Aprilia RXV 55 then it will always be recommended to own a Workshop Manual to keep just for personal reference in the event you need to know how to take out a certain component including Dashboard and match it again accordingly.
Aprilia RXV 55 Workshop Manuals gives you distinct diagnostic guides on your car or truck so if something is playing up it can help you determine what the problem is and methods to fix it. You will be able to evaluate if you can do this by yourself or in case the job is just too big it is possible to book your RXV 55 into a decent mechanic.
Aprilia RXV 55 manual