If you want to perform maintenance to your KTM 690 Enduro R then it will always be a good idea to possess a Workshop Manual to keep just for reference in case you need to know how to remove a particular part for example Exhaust and fit it again adequately.
KTM 690 Enduro R Workshop Manuals will give you detailed diagnostic information for the vehicle therefore if something is playing up it will help you understand what the situation is and the best way to resolve it. You will be able to analyse if you can do this by yourself or that the job is simply too big it is possible to make a reservation for your 690 Enduro R in with a suitable car garage.
KTM 690 Enduro R manual