If you want to undertake maintenance on your Yamaha R 5 then it is usually a good plan to possess a Workshop Manual for reference if perhaps you want to know proven methods to remove a specific part much like the Drive Shaft and install it again the right way.
Yamaha R 5 Workshop Manuals gives you particular diagnostic guides for the automobile so if something is playing up it can help you identify what the issue is and methods to make it better. You will be able to analyse if you can do this by yourself or in case the job is too big it is possible to make a booking for your R 5 into a nearby mechanic.
Yamaha R 5 manual