If you need to execute maintenance tasks to your KTM 400 LSE then it is usually a great idea to possess a Workshop Manual for reference should you want to know simple methods to strip off a specific part for example Brake Discs and match it again safely.
KTM 400 LSE Workshop Manuals can offer you particular diagnostic guidelines with regards to your car so if something is not working it can help you identify what the problem is and how you can fix it. You can then determine if this can be achieved yourself or that the job is too big you can actually book your 400 LSE right into a local repair garage.
KTM 400 LSE manual