Mini 4WD, Mini F1 Motors Hyper Mini Motor Mini F1 Rev-Tune Motor Mini F1 Torque-Tune Motor All motors have been tested and are functional, but the exact RPM is unknown. They were stored in motor cases to prevent demagnetization and to keep them from touching other items. Please understand that these are old items before purchasing. #Tamiya #Mabuchi Motor #Hyper Mini #Mini F-1