If I order a Nine T model that – in literature and on-line – illustrates it with the rear "hump cover", is it delivered with a rear seat also?
And do they use the same mounting hardware for quick swops?
The Racer comes standard with a rear hump but there is no passenger seat provided as it is setup for solo riding.
Some of the 719 Option bikes have a rear hump included but you'd have to check if they include the seat pad, they should as generally the passenger footpeg frame is still attached to the bike.
Swapping over between the seat pad and the hump is a 1min task undoing one bolt.