If you choose to execute fixes on your Aprilia RXV 45 then it is always a good plan to own a Workshop Manual to keep just for a reference in the event you want to know tips to remove a specific part including Gearbox and install it again effectively.
Aprilia RXV 45 Workshop Manuals will give you exact diagnostic guidelines with regards to your car or truck so if something is not working it will help you discover what the problem is and the best way to correct it. You can then evaluate if you can do this yourself or if the job is just too big you could make a booking for your RXV 45 in to a trusted car garage.
Aprilia RXV 45 manual