If you want to do fixes to your Veli ZQ 90 then it will always be a good plan to have a Workshop Manual for a guide in the event you need to know tips to remove a particular component much like the Exhaust and install it again perfectly.
Veli ZQ 90 Workshop Manuals provide you with targeted diagnostic guides with regards to your car therefore if something is broken it will help you ascertain what the issue is and easy methods to correct it. Then you are able to determine if you can do this on your own or in the event the job is just too big you could make a reservation for your ZQ 90 in to a trusted garage.
Veli ZQ 90 manual