If you have to perform adjustments to your Honda NSR 250 R then it will always be a good idea to have a Workshop Manual for personal reference in case that you want to know methods to strip off a certain part for instance the Drive Shaft and install it again accurately.
Honda NSR 250 R Workshop Manuals offers clear specified diagnostic info on your automobile so if something is not working it will help you figure out what the situation is and easy methods to fix it. After that you can analyse if this can be achieved on your own or if ever the job is too big you could make a reservation for your NSR 250 R in to a suitable garage.
Honda NSR 250 R manual