Yamaha fixed the ECU. The bike is fully capable of revving to 17,500, Yamaha just decided against doing so for purposes of engine life.
This really isn't anything new, all redlines work that way. Nearly all bikes are capable of spinning well past their redlines, but the manufacturers limit how high the engine can rev to improve durability.
This really isn't anything new, all redlines work that way. Nearly all bikes are capable of spinning well past their redlines, but the manufacturers limit how high the engine can rev to improve durability.