Add a Pedal Assist Sensor to an Old One Piece Bike Crank
How to Add Pedal Assist to a "Older" One Piece Bike Crank
Amazon Affiliated Links:
Pedal Assist Sensor:
https://amzn.to/3YOJTsP
25/32 Drill Bit:
https://amzn.to/4912po3
Step Drill Bit:
https://amzn.to/3LoG7U0