If you need to conduct maintenance to your KTM 400 SXC then it is always a good plan to have a Workshop Manual to keep just for a reference if perhaps you need to know proven methods to remove a specific component much like the Exhaust and fit it again successfully.
KTM 400 SXC Workshop Manuals offer you particular diagnostic info for the vehicle so if something is playing up it can help you discover what the issue is and some ways to fix it. After that you can assess if this can be done yourself or that the job is simply too big it is possible to make a reservation for your 400 SXC into a nearby garage.
KTM 400 SXC manual