Actually it is a three speed motor. You use a 4 position switch...off, on1, on2, on3 (rotary) and the motor will operate at whichever speed you choose. As I recall on this one orange is low speed, red is medium and yellow is high speed. The motor is wound for 3 speeds. No resistor and no start nor run capacitor is needed. Just a plain old common three speed fan motor used in all sorts of applications. Very common in hang-down AC units with a cylinder type fan and also in heating units with a three or four bladed fan.
