I change the board from an abandoned Bird scooter to the original Xiaomi M365 board and it works! Plus I show you how to make it much faster with a way higher top speed (19mph) enjoy!
if you are at 1.4.1 or 1.4.2 you have to downgrade and revert to 1.4.0 first before you can put custom firmware on it. to do this first you need to install this apk: https://drive.google.com/file/d/1iIjbVOpYl8Wwhhn_I0Q97PtSrea9KmMN/view?usp=drivesdk
Here's first firmware to install that unlocks you from the bs 141 or 142 versions:
https://drive.google.com/file/d/13APWYNtL68j2MXHut06yLrOwv8PxsdjG/view?usp=drivesdk
i learned this from watching this video https://youtu.be/UqsqTERDwSU
final firmware files, use the one at the top 200CFW.bin this is the one i have had good luck with so far
https://drive.google.com/file/d/10g01Oiq97CbQHxBXGD9if2-SefO7q9TG/view
ebay part link here:
https://rover.ebay.com/rover/0/0/0?mpre=https%3A%2F%2Fwww.ebay.com%2Fulk%2Fitm%2F183638494953
thanks for watching!