Excellent performance, specially designed for racing; Compared with V10 G3R motor, the KV value of 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 fully exposed stator core maximizes the heat dissipation area and increases the direct heat dissipation area by 25.6% compared with G3R. In addition, the rear end of the motor is a big opening structure to further improve the heat dissipation effect. Dual sensor interface design to meet various wiring/layout requirements. The special copper bar is customized and the spacing of copper bar is widened, which greatly facilitates the operation of soldering wire. The built-in high precision Hall sensor combined with the high precision and balanced rotor guarantee outstanding linearity of the motor. The motor case is designed to be easy to dismantle for maintenance purposes and for the replacement of common wearing parts. The use of high-performance stator core, heat(200°C)-resistant wire, heat(180°C)-resistant rotor with strong structure, world-class high precision and high strength bearings, and copper solder tabs with super current It's compliant with IFMAR, ROAR, EFRA, BRCA, JMRCA rules, and certificated by RoHS, CE, FCC and etc. Notes: The KV value is measured when no load is applied to the motor, the motor timing is set to the value by default and the ESC timing is set to Zero. Never allow the motor to get overheat, because high temperatures may affect its performance. Please let the motor cool down before using it again in case that it gets too hot. The input current corresponding to the maximum output power can be instructive for load configuration & ESC selection, we strongly suggest not allowing the load to be higher than the input current corresponding to the maximum output power.