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 72VMOTOR138 QS PMSM 4KW 90H V3 Mid Drive Motor With Internal Gearbox With 12.35 Reduction Ratio Inside, with 6500-7000rpm.. Application: e.g. Dirt bike. E-motorcycle