After going with taller bars / rearset risers / Zero MX seat on my '14 'MX', I was happy with the position of everything but my legs. My feet seemed too far forward with excessive knee angle, and going from sitting to standing required pulling back slightly on the bars, which none of my other bikes needed (and I hated).
These adaptors move the OEM footpeg mounts 23mm down & back, and 16mm farther apart. In addition to mounting-bolt holes they have protruding pegs to engage the frame's footpeg-boss locating holes, and blind holes to accept the OEM footpeg mounts' pegs. The lower front corners of the adaptors extend 10mm below the skid plate, but the adaptor steel (316 stainless) surrounds & protects the mounts from wide/flat impacts. Mounting bolts required are M10 x 35 x 1.5 (frame) and M10 x 22 x 1.5 low socket-head (footpeg mount) - all were torqued to 35 ft/lbs using blue Loc-Tite. These adaptors will fit the '14 FX and possibly the '15-'16 FX and FXS too, but the DS / S / SR have different brake-pedal and kickstand clearance situations so I have no idea if they'll fit those bikes correctly or not. All the '14-'16 Zeros use the same 20-02723 (LH) and 20-02724 (RH) footpeg mounts.
Left to right - LH out side / in side, RH in side / out side:
... and here's the RH one on the bike (far left is aluminum CNC test blank, adaptor w/mount only, and complete peg/mount/adaptor setup):
Here are the diagrams - I added a .125" top step for added brake-pedal clearance to both (in case CNC mirror-imaging is used).
After 5 rides, some observations:
1) They make a lot of small things easier: sitting/standing transitions, moving feet down to (and up from) the ground quickly, braking (which feels more like a straight push down now, rather than a curved one down & back), power sliding, lifting front end over obstacles (especially while standing), etc. The total effect is one of feeling more comfortable and in-control on the bike.
2) Rear traction seems improved slightly, possibly at the expense of front grip.
3) Brake pedal is now offset inward slightly like my ICE bikes, so it's easier to avoid riding the brake.
Ray