Model Description

The KX legacy created a long line of champions. The drive to produce more has not slowed down. Our all-new flagship race machine, the KX450 motorcycle, offers next-level engineering and power to dominate the track. Over the decades, we’ve learned what it takes to win and stay on top. The KX450 embodies this legacy to the fullest.

Available From November 2023

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Model Specification

  • Engine

    Engine type

    Liquid-cooled, 4-stroke Single



    Bore x stroke

    96 x 62.1 mm

    Compression ratio


    Valve/Induction system

    DOHC, 4 valves

    Fuel system

    Fuel injection: 44 mm x 1


    Digital DC-CDI



  • Transmission



    Final Drive


    Primary reduction ratio

    2.727 (60/22)

    Gear ratios: 1st

    1.750 (28/16)

    Gear ratios: 2nd

    1.412 (24/17)

    Gear ratios: 3rd

    1.188 (19/16)

    Gear ratios: 4th

    1.000 (19/19)

    Gear ratios: 5th

    0.875 (21/24)

    Final reduction ratio

    3.846 (50/13)


    Wet multi-disc, manual

  • Frame

    Frame type

    Perimeter, aluminium


    Trial: 115 mm

    Wheel travel - front

    305 mm

    Wheel travel - rear

    307 mm

    Tyre - front

    80/100-21 51M

    Tyre - rear

    120/80-19 63M

    Steering angle - left / right

    42 / 42

  • Suspension

    Suspension - front

    49 mm inverted telescopic fork with adjustable compression and rebound damping.

    Suspension - rear

    New Uni-Trak with adjustable dual-range (high/lowspeed) compression damping, adjustable rebound damping and adjustable preload.

  • Brakes

    Brakes - front

    Single semi-floating 270 mm petal disc. Caliper: Brembo Dual-piston

    Brakes - rear

    Single 240 mm petal disc. Caliper: Single-piston

  • Dimensions

    Dimensions (L x W x H)

    2,180 x 820 x 1,270 mm


    1,480 mm

    Seat height

    960 mm

    Fuel capacity

    6.2 litres

    Curb Mass

    112.6 kg