If you need to conduct maintenance for your UM V2S 250 R then it is always recommended to possess a Workshop Manual to keep just for personal reference in case that you need to know simple methods to take out a specific part for example the Drive Shaft and fit it again properly.
UM V2S 250 R Workshop Manuals offers clear specific diagnostic information for your vehicle so if something is not working it can help you work out what the problem is and how you can make it better. After that you can evaluate if this can be achieved by yourself or if the job is simply too big you can actually make a booking for your V2S 250 R in with a decent garage.
UM V2S 250 R manual