motor138New Arrival QS138 70H V3 Mid Drive Motor . QS 138 70H V3 for Electric ATV Dirt bike and Motorcycle For QS138 70H V3 mid drive motor with 1:2.35 gear box, it could be used for electric dirtbike, electric motorcycle, electric ATV 72VIntroducing E&C latest Moto Offering! The MX Edition 138 v3 is custom tailored by E&C for Motocross or similar power sports applications! You can rest assured that this motor