saldog, your photo is helpful in that it pretty much illustrates that no seat built for 2012-2020 is going to fit properly on a 2021 NCX. Thanks for posting.Sargent seat arrived today. This seat is intended for models up through 2020 and we haven’t yet heard how well they fit on a 2021.
I can confirm it did mount securely on my 2021. However, the seat outline clearly is different and does not match the contours of the bike. See photos. If you don’t care about appearance much, it might be fine for you aesthetically. I’m not sure myself.
As for comfort, that is very subjective. It is much firmer than the stock seat. I think it will require a couple weeks of riding to see for sure. It has the padding in the right places, feeling supportive on the two pelvic high points in the buttocks. I haven’t test ridden yet.
I have to decide if I want to keep it and if so, I’ll spend some time with it and let you know.