Hey guys I have a BMW TA02 I just bought a speed gems pro arconite 19x1 motor and I have the stock 74 tooth spur and a 21 tooth pinion I want to buy the speed tune gears that are 69 and 66 tooth spurs but how do they work with the motor mount or do I need another one and what gearing should I be running with that motor the stock 74t spur and 21t pinion the motor hot and the battery pack gets hot