The amazing handling and feal of a Supermoto also comes from the small seat and the ability to move around. I found this great seat,  Acerbis X-Seat normally for a KTM range of bikes. Its a soft comfort seat with amazing grip.

Going to build the whole frame, subframe and fairings around this seat. Hopefully the narrownes of the seat isnt going to be a problem on top of the wide engine and frame. Hypermotard 1100 as reference.