From Unofficial Zero Manual
The seat is provided in a rider seat section and a passenger seat section.
- The passenger seat can be released with the key, revealing a small tray (for tools, perhaps) and hooks for locking a helmet on each side of the tail.
- The rider seat can be released by Torx (T15?) bolts that are at the front of the area under the passenger seat.
The SR/S seat differs from the SR/F seat, apparently in being broader and longer especially for the passenger.