If you take off the engine cover I believe the sensor is under the black square.. if you hold the shell up to the light the square is sort of translucent.
Also the 3 speeds take 3 x AA, one is hidden in the engine area..
This is the one from the wikia,
![[Image: Rcjames.jpg]](https://vignette2.wikia.nocookie.net/tttetrackmaster/images/d/db/Rcjames.jpg)
(This post was last modified: 07-24-2017, 11:14 PM by ripley802.)
Also the 3 speeds take 3 x AA, one is hidden in the engine area..
This is the one from the wikia,
![[-]](https://www.blueplastictracks.org/images/collapse.png)