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 with a HOTA Thunder. [RPM] 42635rpm [Current Consumption] 1.1A After selecting the purchased motor, it has been broken in at an appropriate temperature with a specially developed break-in chemical. It has been broken in for a short time & at low voltage, and the commutator has been mirror-finished, 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 replacement. Also, for the purpose of commutator protection, it will be shipped with a high-viscosity oil applied. Oil may seep to the bottom of the motor upon arrival, but if this happens, please wipe it off with a cloth. ※Regarding maintenance methods Although it is made so that the RPM does not decrease even after long-term use, the performance of the motor may decrease if you clean the inside with parts cleaner or inject oil for brush polishing, so if you absolutely 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 shipped in a zip lock bag via Yu-Packet Post mini. #Mini4WD #MachDashMotor #SprintDashMotor #PowerDashMotor #HyperDashMotor