If you need to execute auto repairs on your TM racing MX 300 then it is usually a good idea to have a Workshop Manual to use as personal reference just in case you need to know the best way to strip off a particular part including Drive Shaft and match it again safely.
TM racing MX 300 Workshop Manuals are able to offer particular diagnostic guides for your vehicle therefore if something is broken it helps you identify what the issue is and some ways to correct it. Then you are able to analyse if this can be achieved on your own or in case the job is too big you can actually make a reservation for your MX 300 in to a trusted friendly mechanic.
TM racing MX 300 manual