I agree with the Kawasaki agent on this one. What you're describing sounds like clogged injectors. They may not have been as bad two days earlier, but it still sounds like they were clogged up. That's the kind of behavior my bike exhibited with it's carburetors when they got clogged.
I can't speak to desert riding with any authority, though.
I can't speak to desert riding with any authority, though.