2021 Kawasaki KX450

New MotorcyclesMotocross


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Engine4-stroke single, DOHC, liquid-cooled


Bore x Stroke96.0 x 62.1mm

Compression Ratio12.5:1

Fuel SystemDFI® with 44mm Keihin throttle body

IgnitionDigital CDI with 3 Coupler Options

Transmission5-speed, return shift, with wet multi-disc manual clutch and hydraulic clutch actuation

Final DriveChain

Front Suspension / Wheel Travel49mm inverted telescopic coil-spring fork with 16-way compression damping and 16-way rebound damping/12.0 in

Rear Suspension / Wheel TravelUni-Trak® gas charged shock with piggyback reservoir with dual-range (4 turns stepless high speed/19-way low-speed) compression damping, 22-way rebound damping and adjustable preload/12.1 in

Front Tire80/100-21

Rear Tire120/80-19

Front BrakesSingle semi-floating 270mm Braking® petal disc with dual-piston caliper

Rear BrakesSingle 250mm Braking® petal disc with single-piston caliper

Frame TypeAluminum perimeter

Rake/Trail27.6°/4.8 in

Overall Length86.0 in

Overall Width32.3 in

Overall Height49.8 in

Ground Clearance13.4 in

Seat Height37.6 in

Curb Weight232.7 lb without fuel / 242.9 lb**

Fuel Capacity1.64 gal

Wheelbase58.5 in

Color ChoicesLime Green

WarrantyNot Available

Kawasaki Protection Plus™ (optional)Not Available

  • Price, if shown and unless otherwise noted, represents the Manufacturer's Suggested Retail Price (MSRP) or dealer unit price and does not include government fees, taxes, dealer vehicle freight/preparation, dealer document preparation charges, labor, installation, or any finance charges (if applicable). MSRP and/or final sales price will vary depending on options or accessories selected; contact dealer for more details.

  • Images, where available, are presented as reasonable facsimiles of the offered unit and/or manufacturer stock images. Non-standard options or features may be represented. No guarantee of availability or inclusion of displayed options should be inferred; contact dealer for more details.