1. the model is 450NK released in 2023 for summer 2024 and it is called 450NK 2024, as CFMOTO does with the releases. 2. I didn't had that limitation from dealer to keep it under 4k RPM, they just told me to keep it under 150Km/h until 1500km when I did first oil change and to dont go on red.... Now I have about 6k Km, my second CFMOTO, never got any issues with them.