A motorized bicycle front derailleur assembly is provided with an
arrangement to protect the motor in the event the chain guide is stuck in
one of the shift positions. The motorized bicycle front derailleur
assembly has a motor unit, a front derailleur and a motor linkage. The
motor unit has an output shaft that rotates between first and second
rotational positions. The front derailleur includes a fixing body, a
chain guide, and a derailleur linkage operatively coupled between the
fixing body and the chain guide. The motor linkage is operatively coupled
to the output shaft and the front derailleur linkage to move the chain
guide in response to rotation of the output shaft. The motor linkage
includes a jamming protection arrangement that is configured and arranged
to move between a force transmitting state and a force override state.