YAMAHA WR450F 2024

The all-new engine is shared with the current YZ450F. It features larger 39mm-diameter intake valves, a new piston, conrod, big end, revised bearings, optimised crank mass inertia and a dry sump oil tank with integrated generator cover. Many engine components are lighter including the intake ports, piston, cylinder body, crank assembly, cam chain, con rod bearings and lubrication system, which results in an engine that’s 1.1 kg lighter. In addition, the MY24 WR450F features an ECU tuned specifically to offer tractability at low speeds and high power at medium to fast-speeds. The new model features the same exhaust pipe design as YZ450F - which runs a short muffler for mass centralisation resulting in improved manoeuvrability and appearance.

The Controlled Fill aluminium bilateral beam frame is now 15mm lower at the head tube to allow a lower centre of gravity for supreme handling. The chassis also has a revised rigidity balance developed specifically for the WR450F. The frame was developed with a focus on flex characteristics and the engine mounts are specially tuned for this model to allow excellent cornering, bump absorption and overall handling. A new compact fuel tank features a larger lower area and lower fuel pump location and a shorter YZ450F-type muffler further increase mass centralisation.

A generous flow of clean air is now fed from the rear of the bike which allows for a slimmer body. The overall shroud width has been made 50 mm narrower and the shape of its side surfaces are smoother. This allows riders to move their legs forward more easily, contributing to the lighter and more agile handling.