Polini's HI-SPEED module/dongle is designed to get you past the 25km/h limit set by the manufacturers which seems to be the sweet spot of where the real enjoyment starts. Plug in the Polini unit and the pedal assist mode is active up to 50km/h which is just over 30mph.
Installation is easy, not too intrusive and can be reversed quickly, wiring is connected directly to the originals using the same connectors.
Polini HI-SPEED E-Bike is available for the following electric bicycle motors
Bosch Active Line, Bosch Active Line Plus, Performance Line, Performance Lince CX
Bosch Classic, Classic Plus (Gen 1)
Yamaha PW series 2015/2016
Yamaha PW-X series 2017 > Onwards
Shimano Steps E6000/E8000
Panasonic 36V Center Mounted Unit