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KX450 2024
KX450MRFNN_GN1
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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. Featuring: 449cc 4-stroke engine with increased performance, new coned disc-spring hydraulic clutch, new Renthal Fatbar handlebar.
Renthal Fatbar
A factory-style ø28.6 mm Renthal aluminium Fatbar, a popular aftermarket part, is now a standard feature.
Hydraulic Clutch
Kawasaki’s first hydraulic clutch on a motocrosser offers more direct feel and lighter lever action.
Factory-Style Chassis and Tuning
Complementing its acclaimed straight-line performance and nimble handling, a redesigned frame with optimized rigidity balance enables improved cornering performance that remains consistent across a wide range of conditions, while more centralized mass also contributes to the improved handling performance. Premium Brembo brake components and ODI Lock-On grips add to both performance and brand recognition.
Advanced Tech at Your Fingertips
The new KX450 and KX450X are the first KX models to offer Power Mode selection and Kawasaki Traction Control at the push of a button. And with smartphone connectivity, riders can adjust engine maps right from their smartphones (another KX first that eliminates the need for accessory equipment using the smartphone application “RIDEOLOGY THE APP KX”).
Slim, Ergonomic Bodywork
Already highly acclaimed for their slim ergonomics, the KX450 and KX450X receive redesigned bodywork that offers an even smoother rider interface. Newly designed shrouds, side covers, and rear fender are firmer and eliminate hooking points, further facilitating rider movement.
Holeshot Advantage: Launch Control Mode
Factory-style launch control system increases the chance of getting a good start by helping riders maximize traction when starting on a low-traction surface.
Hydraulic Clutch
Compared to a conventional clutch, the hydraulic clutch offers more direct feel and lighter lever action. Less play as the clutch heats up during heavy use results in more consistent feeling.
Lightweight Aluminium Perimeter Frame
A redesigned frame accommodates the updates to the engine’s intake and exhaust systems, while delivering a high level of both light, nimble handling, and a composed character. Optimized rigidity balance contributes to increased front-end feel that translates to improved cornering performance in a wider range of conditions.
Race-Ready Suspension
Factory-style Ø 49 mm inverted coil-spring front fork and New Uni-Trak rear suspension offer race-ready suspension performance and adjustability to let riders tune their settings to suit conditions.
Quick-Release Side Cover
Side cover can be removed without tools, facilitating access to the air filter element.
Adjustable Ergonomics
A choice of four handlebar positions and two footpeg positions allows riders to tailor their riding position to suit body size and preference.
Even Stronger Engine
Downdraft intake layout and symmetrically aligned intake and exhaust deliver increased power across the rev-range. Redesigned intake offers a much straighter route for air-fuel mix to enter the cylinder, while a centrally positioned exhaust port lines up with the intake for high airflow efficiency, both contributing to increased performance.
Power Modes
Using the Mode (M) button on the left handlebar, riders can quickly and easily switch between two engine maps (Normal, Mild response) provided in the ECU.
Kawasaki TRaction Control (KTRC)
Using the Traction (T) button on the left handlebar, riders can quickly and easily select from two levels (Weak, Strong) of traction control to suit conditions and preference. Riders may also elect to turn the system off.
ODI Lock-On Grips
Medium-compound ODI Lock-On Grips offer excellent grip feel, while their screw-type fastening system greatly facilitates the task of swapping grips.
High-Performance Brembo Brake System
Revised brake components include drilled Braking/Sunstar discs (Ø 270 mm/ Ø 240 mm) paired with a Brembo caliper and master cylinder at the front and a Nissin caliper and master cylinder at the rear. The high-performance system offers increased controllability on the brakes, contributing to enhanced corner entry.
Smartphone Connectivity
Using the smartphone application “RIDEOLOGY THE APP KX,” riders can access and adjust their bike’s engine maps. Functionality (adjusting fuel and ignition timing) is similar to that offered by the accessory KX FI Calibration Kit used with previous models. Maintenance logs are also available.
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ERGO-FIT
ERGO-FIT is an interface system that allows a wide range of riders to feel at one with their machine. -
KTRC
2-Mode KTRC (Kawasaki TRaction Control), easily selectable from switches at the left handle. -
LCM
Launch Control Mode is a motocross-use start mode that helps riders get the holeshot by minimising wheel spin off the start. -
Smartphone connectivity
Smartphone connectivity contributes to an enhanced motorcycling experience by enabling riders to connect to their motorcycle wirelessly. -
Power modes
Power Mode selection allows engine power delivery to be changed.
Specification
Engine
- Engine Type: Liquid-cooled, 4-stroke, single-cylinder
- Pojemność skokowa silnika: 449 cm³
- Bore x stroke: 96.0 x 62.1 mm
- Compression ratio: 12.5:1
- Valve system: 4 zawory DOHC
- Fuel System: Fuel injection: 44 mm x 1
- Ignition: Digital DC-CDI
- Starting system: Electric
- Lubrication: Forced lubrication, semi‑dry sump
Brakes & Suspension
- Front brake type: Single semi-floating petal disc Ø 270 mm, Brembo dual-piston
- Rear brake diameter: Single petal disc Ø 240 mm, Single-piston
- Front suspension type: Inverted fork Ø 49 mm with adjustable compression and rebound damping
- Rear suspension type: Uni-Trak, adjustable dual-range (high/low-speed) compression and adjustable rebound damping, and spring preload adjustability
Performance & Transmission
- Clutch: Wet, multi disc
- Transmission: 5-speed, return shift
- Final drive: Chain
- Primary reduction ratio: 2.727 (60/22)
- Final reduction ratio: 3.846 (50/13)
- Gear ratios 1st: 1.750 (28/16)
- Gear ratios 2nd: 1.412 (24/17)
- Gear ratios 3rd: 1.188 (19/16)
- Gear ratios 4th: 1.000 (19/19)
- Gear ratios 5th: 0.875 (21/24)
Frame & Dimensions
- Frame type: Perimeter, aluminium
- Trail: 115 mm
- Wheel travel front: 305 mm
- Wheel travel rear: 307 mm
- Tyre, front: 80/100-21 51M
- Tyre, rear: 120/80-19 63M
- L x W x H: 2,180 x 820 x 1,270 mm
- Steering angle L R: 42° / 42°
- Wheel base: 1,480 mm
- Ground clearance: 345 mm
- Fuel capacity: 6.2 litres
- Seat height: 960 mm
- Curb mass: 112.6 kg
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