I have 200 miles now on my X 300 and the seat has not softened at all! Put an Airhawk dual sport pad on it for a temporary fix. That helps but just a temporary fix until Seat Concepts releases custom seat as mentioned above in 30-60 days. Do love this bike !!!!
I recall how hard the seat was when demo riding a ninja 300 when they first came out, but sport bikes are supposed to have firm seats since you are moving around.