If you have to do adjustments on your TM racing MX 300 then it is usually recommended to possess a Workshop Manual for a reference if perhaps you need to know the way to take out a certain component for example, the Clutch and fit it again in the correct manner.
TM racing MX 300 Workshop Manuals will give certain diagnostic information with regards to your car or truck therefore if something is broken it can help you identify what the issue is and ways to correct it. You can then decide if this can be done yourself or in case the job is just too big you can still book your MX 300 in with a decent car garage.
TM racing MX 300 manual