Just found a guy who have a Ninja H2 2016 and the transmission failed.
I post here because our bike have a lot in common with the h2 and i'm sure most transmission are the same.
Sure the primary ratio is lower so the transmission take less torque than the H2 but still a good amount.
Ninja ZX10R 2016 first gear max torque : 490 Nm
Ninja H2 2016 first gear max torque : 660 Nm
Ninja H2 SX first gear max torque : 625 Nm
Ninja ZX10R 2016 second gear max torque : 422 Nm
Ninja H2 2016 second gear max torque : 523 Nm
Ninja H2 SX second gear max torque : 502 Nm
I know there is a recall for Zx10r 2016 to 2018 gearbox with the same failure.
I'm also worried about flashed bike because the torque is even bigger.
Edit : 2500 miles on a 2016 bike seems a bit low to me.