scooter for sale

Bought off a crackhead as parts. Was missing controller and most of stuff. Bought and installed brand new controller and throttle -display. Scooter works but the battery I have cuts off if going on full throttle. It works fine if you throttle let go and throttle again. If you can get a 48v battery it will work without issues. my battery has a Built in board which blocks power to the new controller. max speed is 42kmh