All-new minimalist bodywork includes even slimmer radiator shrouds thanks to re-oriented radiators, a flatter seat and tank, and smooth seamless design that make it easier for riders to move around.

Intake ducts added below the rear of the seat contribute to improved response.

Fuel-injected engine offers hard-hitting  power across the rev-range while ensuring stable fuel-metering in all conditions.
Changes to the intake ports, intake valves and a new offset cylinder deliver even more power.

Riders can choose from two positions to suit body size and preference. Adjustable footpeg brackets enable riders to lower their footpeg position 5 mm.

Works-base bridged-box bottom piston (unique Kawasaki feature used for the first time on a mass-production motocrosser on the 2010 KX450F) is just one of many features inspired by our factory racers.

Factory-style launch control system increases the chance of getting a good start by helping riders maximise traction when starting on a slippery surface. 

Aluminium perimeter frame is a narrower across the main beams, considerably lighter, and features revised rigidity contributing to greater front-end feel.

Oversized ø270 mm front disc delivers strong stopping power and excellent controllability. The factory-style front and rear petal brake discs also contribute to high-quality sporty looks.

A choice of four positions allows riders to tailor their riding position. Factory-style Renthal handlebar and pad come standard.

Weighing in at 108.7 kg, the new KX450F is over 3 kg lighter than its predecessor. The weight reduction comes care of a thorough re-evaluation of both engine and chassis components.

KX FI Calibration Controller, a portable handheld calibration tool, enables riders to make changes to engine maps by plugging into the ECU without needing a PC or battery. Comes equipped with seven preset map settings.

Aggressive new bodywork makes the bike look more compact and is complemented by factory-style design and graphics.

Lightweight ECU was designed specifically to withstand the rigors of motocross racing. ECU contains three engine maps (plus a fourth for Launch Control Mode). Settings for the three maps can be reprogrammed with the optional KX FI Calibration Kit.

Factory-racer-style SFF-Air TAC front fork locates its damping assembly in the left fork tube and a pneumatic spring, comprised of three pressurised air chambers, in the right. Light weight, low friction, easy adjustability, a wide setting range and precise settings are some of the advantages.

Super-hard titanium coating protects the fork from wear abrasion. Self-lubricating alumite coating creates a hard, low-friction surface on the outer tube, protecting the aluminium surface and further reducing friction to promote smooth fork action.