2025 KAWASAKI KX 450X

Tough terrain won't stop us from winning. With championship-proven technology and tuning to take on every challenge, the KX™450X motorcycle has what it takes to win outdoors. Get the off-road edge by riding the bike built to stay ahead of the rest.

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 Maximum Controllability

Ergo-Fit® Adjustable Components for Ride Position Optimization

Off-Road Ready Suspension, 18-In Rear Wheel, Sealed Chain, Side Stand

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 Stay Ahead

The same championship-proven engine performance found in KX™ motocross bikes propels the KX™450X motorcycle to the finish line. Stay ahead of the competition with a powerful engine that delivers broad, useable torque and strong, responsive power.

Cross-Country Power

The KX™450X motorcycle's 449cc 4-stroke engine features a downdraft intake layout and centrally positioned straight exhaust port for high airflow efficiency to deliver robust power across the rev-range.

Smooth Power Delivery

A flat torque curve makes it easy to get on the gas sooner, delivering smooth and powerful acceleration to pass the competition and keep you ahead of the pack.

Optimized Performance

Engine maps are optimized for cross-country racing and are tunable using RIDEOLOGY THE APP KX™ on your smartphone. By tuning engine maps, the rider can change power delivery to best suit riding conditions and personal preference.

Quick Starting

Fast, reliable starting can make or break your race, from nailing that dead-engine start to get you out front early to restarting the engine after stalling. Electric start makes it as easy as pushing a button.

Cross-Country Tuned Suspension

Dominate Off-Road Conditions

The KX™450X motorcycle's high-performance, race-ready suspension is optimized for cross-country racing, especially on aggressive trails.

Optimized for Cross-Country

A high-performance 49mm inverted Showa coil-spring fork comes directly from the KX™450 motorcycle. Front spring rates and damping settings tuned for cross-country riding offer reassuring feedback, especially when riding on challenging trails.

Adjustable Settings

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 linkage system mounts the suspension arm below the swingarm, allowing a long rear suspension stroke for precise tuning. As a result, riders can optimize damping and rear-wheel traction to suit conditions and personal preference.

Advanced Technology

Next-Level Performance

The KX™450X motorcycle's 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 KX450X provides advanced technology designed to inspire confidence.

Choose Your Preference

The KX™450X motorcycle features Power Mode Selection, which allows riders to switch between 2 power modes 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 KX450X.

Kawasaki TRaction Control

The KX™450X motorcycle 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.

Power From The Start

A factory-style launch control system helps put the KX™450X motorcycle’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, and a maintenance log for recording memo-style logs —plus many more useful functions.

Light Pull & Self-Adjusting

A coned disc-spring hydraulic clutch offers light clutch pull and a wide engagement range. Compared to a conventional clutch, the hydraulic clutch offers more direct feel and lighter lever actuation, while large diameter plates provide enhanced fade resistance.

Chassis & Ergonomics

Race-Winning Capability

Stay ahead of the competition with a strong and lightweight chassis, agile handling, and exclusive ERGO-FIT® technology.

High-Performance Brembo Brake System

A high-performance Brembo brake system delivers next-level stopping power on the KX™450X motorcycle. The braking 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.

Power To The Ground

The KX™450X motorcycle is built to meet the tough demands of cross-country racing. Cross-country wheels (21-in front/18-in rear) are paired with specific Dunlop Geomax AT81 tires developed for GNCC racing.

Lightweight & Nimble

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

Get A Grip

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

Factory Fit

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

Optimized Bodywork

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.

Easy 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 - 120/80-18

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 - 27.0°/4.6 in

Overall Length - 85.6 in

Overall Width - 32.1 in

Overall Height - 49.6 in

Ground Clearance - 13.2 in

Seat Height - 37.4 in

Curb Weight - 239.8 lb* without fuel / 249.9 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