Engine cut-off sensor on derailleur.
This sensor, which connects directly to the yellow output of the motor, allows you to automatically cut the motor when you change gear and thus avoid your chain hitting the chainrings!
This addition to our kits is the ideal solution if you want to preserve your derailleur, when you change gears an engine cuts out!
If your derailleur cable is frayed, you need to get the version with derailleur cable, because the cable goes through the sensor and frayed cable will make it impossible to pass the cable!
