Razor E200 E300 Speed Controller Hack for More Speed and Power - YouTube
E300 Electric Scooter - Razor
Razor E200, E300, MX350, and Pocket Mod Variable Speed Kit with Key Throttle
Amazon.com : AlveyTech ZK2430-D-FS Control Module - Fits The Razor E300/E325 (V20+) Replacement Controller for Electric Scooter/Bike Parts, Dirt Scooters, Electrical Bicycles Quick DIY Connector : Sports & Outdoors
Throttle and Speed Controller Kit for Razor E200/E200S/E225/E275 Version13+, E300/E300S/E325 Version 11 and Version 13+, MX350/MX400 Version 33-36, RX200 Version 1+, and Pocket Mod Version 45+ #RAZ-EKIT7
24V 350W Brush Motor Controller Thumb Throttle for Razor Quad ATV Scooter E300 - AliExpress
Razor E300 Electric Scooter Hack - How To Replace Speed Controller With Relay - YouTube
Razor E300 Gets a Big Motor Upgrade - Scooter Episode 5 - YouTube