For R5 PRO/RX80/U8, It is YL81F instrument, and the steps of speed limit are as follows:
1. Press + and - at the same time to enter setting mode
2. Press the + button to switch the page to 08P
3. Press the - button to adjust the speed to 25KM/H
For RX70/RX20/R8S, It is S2 instrument, and the steps of speed limit are as follows:
1. Quickly double-click the M key to enter the setting interface, and press the + key to enter A05.
2. Press the M key to enter the password 1801, and confirm with the M key to enter the next setting interface.
3. Press the + key to switch to the A3 setting options, short press the M key to enter parameter settings, and press the + or - key to set the value to 25.
4. After setting the value, short press the M key to exit the setting, and then quickly double-click the M key to exit the setting interface.
