If you want to accomplish maintenance to your KTM 300 MXC then it is always recommended to have a Workshop Manual to use as a reference in case you need to know techniques to take out a particular component much like the Clutch and fit it again in the correct way.
KTM 300 MXC Workshop Manuals will give specific diagnostic wisdom with regards to your car or truck therefore if something is wrong it helps you determine what the issue is and how you can correct it. You will be able to assess if this can be achieved on your own or that the job is simply too big you can actually make a booking for your 300 MXC into a trusted friendly mechanic.
KTM 300 MXC manual