5x11mm (Axial AXA0175 or Hot Racing SSP311) or M3x2

and squeeze the trigger

If you crawl

Battery for 4PKS

- Replace lock nut as needed

Power Hobby - BMA-01 Brushless Motor Analyzer; RPM, KV, Voltage Checker, Motolyzer (Sensored & Sensorless) HPI110662 5x11mm (Axial AXA0175 or HotThis motor analyzer is a precision electronic device that is specially designed for measuring the KV value, RPM, current draw, motor timing, vibration noise level, and function of hall effect sensors of a brushless motor. It comes with a 2X16 character LCD that is able to display real time values of either sensored or sensorless brushless motors. KV VOLT RPM AMP: KV (RPM per Volt) Shows the rotor RPM Volt at a certain throttle power level. U (VOLT)