Just did this and it works.. could also apply to BBS01.
1) take off the chainring guard and chainring.
2) unbolt the controller ( 3 bolts )
3) find 4 pin connector ( to the left )
4) unplug connector
5) remove the grey wire from the female side of the connector by pushing the pin that locks it into place with a small screwdriver and tugging on the wire. Cap the wire off with electrical tape or however you wish to do it.
6) plug connector back in and reinstall all parts.
7) enjoy!
Important note: if you free-spin the motor without any load for ~3 seconds, you will get an 'error 21' on the screen. This is not because you just did the modification. The bafang just complains about not having any load on it.
1) take off the chainring guard and chainring.
2) unbolt the controller ( 3 bolts )
3) find 4 pin connector ( to the left )
4) unplug connector
5) remove the grey wire from the female side of the connector by pushing the pin that locks it into place with a small screwdriver and tugging on the wire. Cap the wire off with electrical tape or however you wish to do it.
6) plug connector back in and reinstall all parts.
7) enjoy!
Important note: if you free-spin the motor without any load for ~3 seconds, you will get an 'error 21' on the screen. This is not because you just did the modification. The bafang just complains about not having any load on it.