Stock seat is always foam on the Concours. Kawasaki does make an optional gel seat, but I personally would not recommend a gel replacement because I had bad experiences with one (although it was not Kawasaki). They get VERY hot from the sun or cold from the environment and do not let go of that state.
Probably would need to either have your seat re-worked (cut down, different foam density installed, etc), or get an aftermarket seat like a Sargent, Corbin, etc... Plenty of threads on the Forum about replacement seats or seat modifications, just search.
