Originally Posted by torg

"Changeable motor layout three positions. In accordance with the course layout and the road surface condition and a wide range of settings. Layout also change the exchange of belt only in the re-adjustment of the tension is not required."

This makes me think that there are three fixed positions for the motor to be in (like a mini?) and changing gear ratio i.e. 64p gears and meshing them can become challenging. of course I could be wrong.