Thank you for viewing. This is a listing for a pre-broken-in Mini 4WD Mach Dash motor. The displayed RPM and current consumption are the values measured using a HOTA Thunder. [RPM] 39648rpm [Current Consumption] 1.1A After selecting the purchased motor, it has been broken in at an appropriate temperature using a specially developed break-in chemical. It has been broken in for a short time & the commutator has been mirror-finished at low voltage, so the brushes are moderately remaining, resulting in a motor with good torque. The end bell is unopened, parts cleaner is not used, and measurements are not taken with excessive contact pressure using demagnetization or a vise, which can cause torque loss. Although the RPM and current consumption are listed, a motor is a living thing. The condition is constantly changing. Please use the values as a reference. We cannot guarantee performance or accept returns due to complaints. Please understand this to prevent swapping. Also, for the purpose of protecting the commutator, it will be shipped with a high-viscosity oil applied. Oil may seep to the bottom of the motor upon arrival, but please wipe it off with a cloth. ※ Regarding maintenance methods The motor is designed so that the RPM does not decrease even after long-term use, but the performance of the motor may decrease if you clean the inside with parts cleaner or inject oil for brush polishing, so if you want to clean it, please use a strong air duster. [Regarding shipping method] To prevent moisture and dust from entering the motor, it will be placed in a zip lock bag and shipped via Yu-Packet Post mini. #Mini4WD #MachDashMotor #SprintDashMotor #PowerDashMotor #HyperDashMotor