I have realy bad experince with KD36-74-9XL motor
http://www.hobbycity.com/hobbycity/s...idProduct=6678
It supposed to run cooler that my Feigao 7XL and ran Hotter actualy then geared even lower speed than 7XL it cogged and Mamba Max heated up pretty fast too and on the end of run inner magnet came loose from shaft. Total runtime about 10min. Its waist of money