1 - 11 stators/motor
||Nirody JA, Berry RM, Oster G. The Limiting Speed of the Bacterial Flagellar Motor. Biophys J. 2016 Aug 9 111(3):557-564. doi: 10.1016/j.bpj.2016.07.003 p.557 right column top paragraph, p.558 caption to figure 1 & p.559 table 1PubMed ID27508439
||Primary source to table 1:  Yuan J, Fahrner KA, Turner L, Berg HC. Asymmetry in the clockwise and counterclockwise rotation of the bacterial flagellar motor. Proc Natl Acad Sci U S A. 2010 Jul 20 107(29):12846-9. doi: 10.1073/pnas.1007333107PubMed ID20615986
||P.557 right column top paragraph: "Specifically, at high loads (low speeds) a motor can have up to 11 docked stators, whereas at low loads (high speeds) motors typically operate with only one stator (though [investigators] note that the experiments in (ref 13) reported that ∼25% of motors likely had two stators)." P.558 caption to figure 1: "An active motor can have between 1 and 11 torque-generating stator complexes."