With more Supercross and Motocross championships than any other manufacturer, the KX name is synonymous with winning. The KX450 motorcycle represents the flagship of the KX lineup, built with the sole purpose of dominating the track. Over the past four decades, we’ve learned what it takes to win and stay on top. Our dedication to building the ultimate machine is undeniable, and the KX450 represents this to the fullest.

Built to Win

The KX™450 engine delivers broad, useable torque and strong, responsive power across the rev range. From the starting gate to the finish line, this race-ready machine is built to stay ahead of the pack.

Leave Them in the Dust

Take the lead with proven race-winning performance. The highly adjustable suspension package delivers smooth action, firm damping and contributes to optimal traction.

Ride With Confidence

From quick, reliable starting to advanced braking power, the KX™450 motorcycle offers superior features designed to inspire confidence. What’s more, this race-ready machine is backed by decades of championship-proven experience.

Made To Shave Lap Times

Experience the race-winning advantage of a strong and lightweight chassis, agile handling and exclusive ERGO-FIT technology.

  • Engine

    4-stroke Single

  • Displacement

    449 cm3

  • Bore x Stroke

    96.0 × 62.1 mm

  • Compression Ratio

    12.5:1

  • Valve System

    DOHC, 4 valve

  • Fuel System

    Fuel injection (o44 × 1)

  • Ignition

    Digital

  • Starting

    Electric

  • Cooling

    Liquid-cooled

  • Lubrication

    Forced lubrication, semi-dry sump

  • Transmission

    5-speed, return

  • Primary Reduction Ratio

    2.727 (60/22)

  • Gear Ratio: 1st

    1.750 (28/16)

  • Gear Ratio: 2nd

    1.412 (24/17)

  • Gear Ratio: 3rd

    1.188 (19/16)

  • Gear Ratio: 4th

    1.000 (19/19)

  • Gear Ratio: 5th

    0.875 (21/24)

  • Final Reduction Ratio

    3.846 (50/13)

  • Clutch

    Wet multi-disc, manual

  • Final Drive

    Chain

  • Frame

    Perimeter, aluminium

  • Front Suspension

    49 mm inverted telescopic fork with adjustable compression and rebound damping

  • Rear Suspension

    Uni Trak with adjustable dual-range (high/low-speed) compression damping, adjustable rebound damping and adjustable preload

  • Front Wheel Travel

    305mm

  • Rear Wheel Travel

    307mm

  • Rake

    27.6o

  • Trail

    122mm

  • Steering Angle (L/R)

    42? / 42?

  • Front Tyre

    80/100-21 51M

  • Rear Tyre

    120/80-19 63M

  • Front Brake/s

    Single semi-floating o270 mm petal disc

  • Front Caliper/s

    Dual-piston

  • Rear Brake

    250 mm petal disc

  • Rear Caliper

    Single-piston

  • Dimensions (LxWxH)

    2185 × 820 × 1265

  • Overall Length

    2185

  • Overall Width

    820

  • Overall Height

    1265

  • Wheelbase

    1485

  • Road Clearance

    340

  • Seat Height

    955

  • Curb Mass

    110 kg

  • Fuel Capacity

    6.2L

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