If you have to undertake auto repairs for your Veli ZQ 125 then it is usually a good idea to have access to a Workshop Manual to keep just for personal reference in the event that you want to know methods to take off a particular part including Brake Discs and install it again in the correct manner.
Veli ZQ 125 Workshop Manuals provides specific diagnostic info with regards to your car or truck so if something is not working it will help you figure out what the issue is and how to fix it. You can then assess if this can be done by yourself or if ever the job is just too big you can actually make a booking for your ZQ 125 into a nearby friendly mechanic.
Veli ZQ 125 manual