2025 KAWASAKI KX450

JKAKXGMC0SA010374

KAW010374

2025

2 km

Motocross Motorcycles Motorsports

KAWASAKI

KX450

Ottumwa, Iowa, USA 52501

New

THE BIKE THAT BUILDS CHAMPIONS 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. 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. 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 BRAKES/WHEELS/TIRES Brakes Front - Single semi-floating 270 mm Braking / Sunstar petal disc with Brembo master cylinder and dual-piston caliper Rear - Single 240 mm Braking / Sunstar petal disc with single-piston caliper Tires Front - 80 / 100-21 Rear - 120 / 80-19 DIMENSIONS Length Overall - 85.8 in. Height Overall - 50 in. Width Overall - 32.3 in. Weight Curb, without fuel - 238.3 lb.* Curb - 248.2 lb.* *Curb weight includes all necessary materials and fluids to operate correctly, full tank of fuel (more than 90 percent capacity) and tool kit (if supplied). Ground Clearance 13.6 in. Wheelbase 58.3 in. Seat Height 37.8 in. DRIVETRAIN Transmission 5-speed, return shift Final Drive Chain ELECTRICAL Instrumentation Smartphone Connectivity via RIDEOLOGY THE APP KX™ Advanced Electronics Kawasaki TRaction Control (KTRC) ENGINE Engine 4-stroke single, DOHC Cooling Liquid Displacement 449 cc Bore x Stroke 3.7 x 2.4 in. (96 x 62.1 mm) Compression Ratio 12.5:1 Clutch Wet multi-disc manual and hydraulic actuation Fuel System DFI® with 44 mm Keihin throttle body Ignition Digital CDI with handlebar-controlled Power Modes Fuel Capacity 1.64 gal. Modes Power, Launch Control OPERATIONAL Frame Aluminum perimeter Chassis Management Technology - ERGO-FIT® Front Suspension 49 mm inverted telescopic coil-spring fork with 21-way adjustable compression and 22-way adjustable rebound damping Wheel travel - 12.0 in. Rear Suspension 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 Wheel travel - 12.1 in. Rake 26.6° Trail 4.5 in. Grips ODI lock-on

6.21 L

449 cc