NopeIts not that,its just you feeling the loss of 100w (or whatevr) that the motor was giving. Its not drag,its just you having to pedal harder to make up for the loss of motor assist.Yea thats it, when I start out with assistance off there is no drag. If I turn the system off while on a ride, there us a lot of drag. Strange.
Maybe when the motor is hot there is drag, or something magnetic that causes the suck down. Dunno.