dEF is the restore factory default parameter settings. dEF-Y is to restore the factory default settings, and dEF-N is not to restore.
Enter into the main setting interface and keep the speed at 0, press Lighgt and + hold and simultaneously for 2s to enter the restore factory default setting interface. Pressing +/- to toggle to dEF-Y. Then after pressing i to confirm, the display will show dEF-0 for a few seconds and then automatically start to restore the factory default settings. The display will automatically exit to setting interface after the restoration. #ebike #gleeride #ridstar