If you have to undertake repairs to your Veli VL125T then it will always be a good idea to have access to a Workshop Manual for personal reference just in case you want to know the way to remove a specific component such as the Wheel Bearing and fit it again the right way.
Veli VL125T Workshop Manuals gives you exact diagnostic guides for your automobile so if something is playing up it will help you determine what the problem is and the way to repair it. You will be able to determine if this can be done on your own or in the event the job is just too big you could make a booking for your VL125T into a trusted repair garage.
Veli VL125T manual