If you have to do adjustments on your own Veli VL125T 3 then it will always be recommended to have access to a Workshop Manual to use as reference in case that you need to know the way to take out a certain component for example Drive Shaft and install it again accordingly.
Veli VL125T 3 Workshop Manuals will give exact diagnostic guidelines for the car so if something is faulty it will help you determine what the situation is and tips to make it better. Then you are able to analyse if this can be done by yourself or in case the job is simply too big you can actually make a booking for your VL125T 3 in to a decent repair garage.
Veli VL125T 3 manual