2025 KAWASAKI KX 450

The KX™ legacy represents a long line of champions. The drive to produce more has not slowed down. Our flagship KX™450 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.

Featuring:

449cc 4-Stroke Engine

Power Mode Selection with A Handlebar-Mounted Switch

Rideology Connectivity - Change Engine Mapping with Your Smartphone

Kawasaki Traction Control (KTRC) With A Handlebar-Mounted Switch

Brembo Brake Components for Premium Controllability

Ergo-Fit® Adjustable Components for Ride Position Optimization

Additional Vehicle Features:

Lightweight aluminum perimeter frame

Straight exhaust port and center exhaust

ODI lock-on grips

Quick-release side cover offers tool-less air filter access

Streamlined ergonomics for easy rider movement

Coned disc-spring hydraulic clutch

Top Features:

Power & Performance

Built to Win

The KX™450 motorcycle 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.

Power Through the Finish

The powerful 449cc engine features a downdraft intake layout and centrally positioned straight exhaust port for high airflow efficiency to deliver robust power across the rev-range.

Pull Ahead

A flat torque curve allows for smooth and powerful acceleration, so you can pass the competition and stay ahead of the pack.

Reliable Starting

Being able to restart your engine quickly after a stall can make or break your race. Powered by a compact and lightweight Li-ion battery and supported by an automatic centrifugal decompression system, all it takes is the push of a button to start up.

Race-Ready Suspension

Leave Them In The Dust

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

Race Ready

The high-performance 49mm inverted Showa coil-spring fork handles suspension duties up front. The fork's internal valving, adjusters, and oil level are fine-tuned to deliver optimized settings. The large-diameter inner tubes (the same size as on our factory motocross racers) enable the use of large damping pistons, delivering smooth action and firm damping.

Championship-Proven

The Uni-Trak® rear suspension system features a Showa shock with adjustable dual-range (high- and low-speed) compression damping, adjustable rebound damping, and adjustable preload. The result is optimal damping and rear-wheel traction.

Advanced Technology

Ride with Confidence

All KX™450 motorcycle advanced controls are streamlined for rider convenience. Kawasaki TRaction Control (KTRC), Power Mode Selection, and Launch Control Mode are available at the push of a button. These features enable riders to quickly adjust power delivery and traction for riding conditions and preference. The KX450 offers superior features designed to inspire confidence.

Advanced Technology

Power Delivery

The KX™450 bike features Power Mode Selection which allows riders to switch between 2 power modes (Normal or Mild response) quickly and easily. Riders can select between Normal (Full Power) and Mild response to suit riding conditions or preference. Mild response is good for riders still familiarizing themselves with the high performance of the KX450.

Kawasaki TRaction Control

The KX™450 bike features Kawasaki TRaction Control (KTRC) at the push of a button. By using the traction button (T) on the left handlebar, riders can quickly and easily select from 2 levels (Weak or Strong) of traction control to suit riding conditions and preference. Riders may also elect to turn the system off.

Every Second Counts

A factory-style launch control system helps put the KX™450 bike’s power to the ground for maximum acceleration. By pushing the Mode and Traction buttons simultaneously, riders activate the launch control system which is designed to deliver efficient race starts in low-traction conditions, making the holeshot yours for the taking.

Smartphone Connectivity

Thanks to smartphone connectivity, riders can adjust engine mapping straight from their phones via RIDEOLOGY THE APP KX™, without the need for extra equipment. The app also provides KX™ FI Calibration to fine-tune fueling and ignition timing, engine monitoring for checking engine metrics, a maintenance log for recording memo-style logs, and many more useful functions.

Light Pull & Self-Adjusting

A coned disc-spring hydraulic clutch offers light clutch pull and a wide engagement range. Large diameter plates provide excellent fade resistance.

Chassis & Ergonomics

Made to Shave Lap Times

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

Advanced Stopping Power

Next-level stopping power matches incredible acceleration capability. The high-performance Brembo brake system features drilled Braking/Sunstar discs (270/240mm) paired with a Brembo caliper and master cylinder at the front and a Nissin caliper and master cylinder at the rear. The premium system offers confident controllability of the brakes, contributing to precise corner entry.

Excellent Traction

Based on feedback from Kawasaki’s factory race teams, the KX™450 bike features a large-diameter rear hub. The hub’s rigidity allows loads to be transferred directly to the ground, contributing to fantastic rear-end traction. Dunlop MX34 front and rear tires offer impressive longevity, excellent ground contact contributing to great cornering performance in the front, and stellar bump absorption and traction in the rear.

Balance Meets Precision

A lightweight aluminum perimeter frame delivers a high level of both light, nimble handling and a composed character. Optimized rigidity balance contributes to a steady front-end feel that translates to precise cornering performance in a wider range of conditions.

Get a Grip

Wide footpegs ensure excellent grip for optimum comfort and control and make it easy to weight the pegs.

Perfect Fit

Find your best performance with the Kawasaki ERGO-FIT® advantage. Four handlebar positions and 2 footpeg positions allow you to tailor the KX™450 motorcycle to your body size, riding style, and preference.

Ergonomic Design

Sleek design of the shrouds, side panels, and rear fender eliminate hooking points, further facilitating rider movement.

Renthal® Fatbar® Handlebar & Odi Lock-On Grips

A factory-style aluminum Renthal® Fatbar® handlebar comes standard. Medium-compound ODI lock-on grips offer excellent grip feel, while their screw-type fastening system greatly facilitates the task of swapping grips.

Quick Access

A quick-release side cover can be removed without tools, allowing for easy access to the air filter element.

Specifications:

Technology

Engine Management Technology

KTRC (Kawasaki Traction Control)

Launch Control mode

Power Modes

Rideology The App KX

Chassis Management Technology

ERGO-Fit

Power

Engine - 4-stroke, single-cylinder, DOHC, liquid-cooled

Displacement - 449cc

Bore x Stroke - 96.0 x 62.1mm

Compression Ratio - 12.5:1

Fuel System - DFI® with 44mm Keihin throttle body

Ignition - Digital CDI with handlebar-controlled power modes

Transmission - 5-speed, return shift, with wet multi-disc manual clutch and hydraulic clutch actuation

Final Drive - Chain

Electronic Rider Aids - Power Modes, Kawasaki Traction Control (KTRC), Launch Control Mode

Performance

Front Suspension / Wheel Travel - 49mm Showa inverted telescopic coil-spring fork with 21-way adjustable compression and 22-way adjustable rebound damping/12.0 in

Rear Suspension / Wheel Travel Uni-Trak® -  gas charged shock with piggyback reservoir with adjustable dual-range compression damping (19-way low speed and 4.25 turn stepless high speed), 23-way adjustable rebound damping and stepless adjustable preload/12.1 in

Front Tire - 80/100-21

Rear Tire - 120/80-19

Front Brakes - Single semi-floating 270mm Braking/Sunstar petal disc with Brembo master cylinder and dual-piston caliper

Rear Brakes - Single 240mm Braking/Sunstar petal disc with single-piston caliper

Details

Frame Type - Aluminum perimeter

Rake/Trail - 26.6°/4.5 in

Overall Length - 85.8 in

Overall Width - 32.3 in

Overall Height - 50.0 in

Ground Clearance - 13.6 in

Seat Height - 37.8 in

Curb Weight - 238.3 lb* without fuel / 248.2 lb*

Fuel Capacity - 1.64 gal

Wheelbase - 58.3 in

Special Features - Smartphone Connectivity via RIDEOLOGY THE APP KX™, ERGO-FIT®

Color Choices - Lime Green