If you choose to perform auto repairs on your own Veli VL150GY then it is always a good plan to have access to a Workshop Manual to use as reference just in case you need to know the best ways to take off a specific component for example the Wheel and install it again the right way.
Veli VL150GY Workshop Manuals are able to offer unique diagnostic wisdom with regards to your vehicle so if something is wrong it will help you work out what the issue is and ways to fix it. After that you can assess if this can be done by yourself or that the job is too big it is possible to make a booking for your VL150GY right into a decent friendly mechanic.
Veli VL150GY manual