May 11, 2015 · The turn-count versions are commonly referred to as 3T, 4T, 5T, and 6T. The Kv of a motor is commonly used as an approximation of how many RPM’s a motor provides per each volt that is applied. For example, Kinaye Motorsports recommends the 5T motor mounted in a 17-inch moped rim and tire, using 72V.