SpeedBox 2.0 for Yamaha PW (until 2018) | Beyond PEV
Yamaha PW SpeedBox Tuning Kit 2.0 Motor EBIKE Electric Bicycles eMountainbike 4270000341199 | eBay
eBike Tuning SpeedBox 2.0 for Yamaha Installation Instruction - YouTube
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