The left side adapter includes an attachment point for
the shift lever which moves with the footpeg to the
new lower position. A longer offset linkage rod attaches
the shifter to the transmission.

The adapters are mounted rigidly to the frame.
The pegs are spring loaded in the adapters

Linkage rod may differ from the one shown in this photo.

Left side
 

Right side

Note the relaxed leg position

Position cahnge, 1.5" down, 0.4" forward.