Resistor or diode or other?

@kmott,

I have a monorail as well but I haven't taken it apart and I haven't used it for quite a while.

I do remember one of these being inside a Plarail Advance ACS (remote control) car.

I believe it is an inductor. Taking it out shouldn't matter but I think it was designed to prevent spikes in the current when switching directions.

Next time when I take apart one with these components, I will measure it properly and when I know more I will post back.

I hope that helps.

-plarnold