Wednesday, 4 March 2026

replacing the pedal assist sensor on a Swytch bike

I put a Swytch electric conversion kit on my bike last summer. It's very useful, though the claimed range is substantially greater than the 22 miles I actually managed on test (a ride from Bradnford on Avon to Bath and back). I was worried that two things would prove problematic for an electric bike on the towpath; mud everywhere, and getting adequate power from my solar panels to keep the battery charged.

Apart from a few gloomy weeks in the depths of winter, I've managed quite well at keeping the battery charged. And the electrics have proved robust in a hostile environment.

All except for the pedal assist sensor. This has clogged up several times, stopping it from working; which meant I've had to strip it down and clean it. 

Swytch do have a few different sensors, but they're all out of stock at the moment, so I decided to put an unbranded sensor on in place of the faulty one. This one came from Amazon and cost me £20. 

Its plug is compatible with the original connector, and now the motor's working as it shuold!