The 2023 CRF450RX takes performance to the next level, thanks to several upgrades designed to boost low-end torque. The intake port is narrower, the air intake longer, the throttle bore now 44mm (down from the previous generation’s 46 mm) and the valve timing and springs have been updated. Combined, these improvements mean more low end torque and better response, meaning riders can maintain a taller gear, leading to less fatigue for riders.