If you choose to do fixes on your Beta RR 450 then it will always be a good plan to own a Workshop Manual for reference in case you need to know easy methods to strip off a certain part for example the Clutch and fit it again successfully.
Beta RR 450 Workshop Manuals provides certain diagnostic details with regards to your car or truck so if something is broken it can help you figure out what the problem is and ways to fix it. You can then decide if this can be done yourself or if the job is simply too big you could make a reservation for your RR 450 right into a decent garage.
Beta RR 450 manual