Amazon.com : SPEEDBOX 2.0 for Yamaha eBike Tuning kit Suitable for All Yamaha PW-TE, PW-SE, PW-X, PWX2, PW-ST Motors. Smart Tuning chip of The Second Generation : Sports & Outdoors
Haibike Yamaha E-Bike Tuning Modul Chip 2019-2022 PW-X, PW-X2, PW-SE, PW-ST und PW-TE
RedPed 2 Haibike 2020 PW-ST Installation - Not so easy anymore - YouTube