The motors are Suntech 385s. The black capped motors turn about 16500rpms and the white ones 11,000rpms. Don't remember the stall amperage but they're both less then 10. The least expensive way to repair the tank is to simply buy 2 boards. One to replace the broken board and another for a spare. The black capped motors really should have a fan cooling the heatsink when using the TK-RX13 or the newer TK-RX14 board. The "search" feature is your friend.