If you wish to do adjustments on your Veli VL70Q then it is always recommended to have a Workshop Manual to keep just for a reference should you need to know easy methods to strip off a specific component much like the Clutch and install it again properly.
Veli VL70Q Workshop Manuals provide you with exact diagnostic guidelines for the car or truck so if something is not working it can help you understand what the issue is and methods to repair it. You will be able to determine if you can do this by yourself or in case the job is just too big you can still make a reservation for your VL70Q in to a nearby repair garage.
Veli VL70Q manual