If you need to undertake repairs to your Kymco MXU 400 then it is usually recommended to have access to a Workshop Manual to use as personal reference if perhaps you want to know tips on how to remove a specific part much like the Brake Discs and install it again safely.
Kymco MXU 400 Workshop Manuals will provide you with precise diagnostic guidelines for your car or truck so if something is playing up it will help you identify what the issue is and tips to make it better. Then you are able to evaluate if this can be achieved on your own or if the job is simply too big you could book your MXU 400 in to a suitable friendly mechanic.
Kymco MXU 400 manual