If you wish to accomplish repairs on your Veli VL90 6 then it is usually a good plan to possess a Workshop Manual to keep just for a guide in the event that you want to know how to take out a certain part like the Door and install it again accurately.
Veli VL90 6 Workshop Manuals gives you exact diagnostic guidelines with regards to your automobile so if something is not working it can help you identify what the issue is and tips on how to make it better. You can then evaluate if this can be achieved yourself or if the job is simply too big you can still make a booking for your VL90 6 into a suitable repair garage.
Veli VL90 6 manual