YZ450FXNEW FOR 2026 A new industry first ECU lock function helps prevent theft and unauthorized engine start up via a password required lock. New four level Traction Control selectable within the Yamaha Power Tuner App maintains ideal rear wheel traction. ENGINE Compact, lightweight and durable clutch assembly yields smooth engagement and excellent feel. The YZ450FX features a compact electric starter system to minimize restart delays and add convenience.