HOBBYWING XERUN V10 21.5T G4 BLACK MOTOR HW30401142HOBBYWING XERUN V10 21. 5T G4 BLACK MOTOR FEATURES Excellent performance, specially designed for racing; Compared with the V10 G3R motor, the KV value of the G4 motor is increased by 9. 8%, the maximum output power is increased by 5%, and the internal resistance is reduced by 4%. The innovative outer diameter structure of the fully exposed stator core maximizes the heat dissipation area and increases the direct heat dissipation area by 25. 6% compared