I had thought that it was legal to swap out the internal gears in the 393 motors for the included high speed gears to make it go 60% faster with the same power as a normal 269 motor, but <R15> states that motors cannot be modified in any way. I am confused. I thought that many teams change these gears on the motors, but is it actually illegal in competitions?
“<R15> Parts may NOT be modified as follows:
a. Motors, extension cords, sensors, controllers, battery packs, and any other electrical component of the VEX Robotics Design System may NOT be altered from their original state in ANY way.”