If you wish to carry out adjustments on your Xmotos XB 21D then it will always be a good plan to have access to a Workshop Manual to use as a guide if you want to know simple methods to remove a certain part for example, the Wheel Bearing and install it again successfully.
Xmotos XB 21D Workshop Manuals can provide targeted diagnostic info with regards to your car so if something is playing up it helps you identify what the issue is and the way to fix it. You can then evaluate if this can be achieved yourself or that the job is just too big you can still make a booking for your XB 21D right into a decent car garage.
Xmotos XB 21D manual