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KX450 XC 2025
KX450NSFNN_GN1
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Tough terrain won’t stop us from winning. With championship-proven technology and tuning to take on every challenge, the KX450X has what it takes to win outdoors. Get the off-road edge by riding the bike built to stay ahead of the rest.
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.
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.
Factory-Style Engine Components and Tuning
The KX450’s engine has always been a strength, but Kawasaki engineers found a way to make it even stronger. Offering increased performance across the rev-range, the more potent new engine is backed by a host of features like Launch Control Mode, electric start and a hydraulic clutch, proven to give racers an edge on the track.
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.
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.
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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. -
Launch Control Mode
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 Mode
Power Mode selection allows engine power delivery to be changed.
Specification
Engine
- Engine Type: Liquid-cooled, 4-stroke, single-cylinder
- Compression ratio: 12.5:1
- Valve system: DOHC, 4 valves
- Bore x stroke: 96.0 x 62.1 mm
- Displacement: 449 cm³
- Fuel System: Fuel injection: 44 mm x 1
- Lubrication: Forced lubrication, semi‑dry sump
- Starting system: Electric
- Ignition: Digital
Brakes & Suspension
- Front brake type: Single semi-floating petal disc Ø 270 mm, Brembo dual-piston
- Rear brake type: Single petal disc Ø 240 mm, Single-piston
- Front suspension type: Inverted fork 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
- Transmission: 5-speed, return shift
- Clutch: Wet, multi disc
- Primary reduction ratio: 2.727 (60/22)
- 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)
- Final reduction ratio: 3.846 (50/13)
- Final drive: Sealed chain
Frame & Dimensions
- Frame type: Perimeter, aluminium
- Trail: 119 mm
- Wheel travel front: 305 mm
- Wheel travel rear: 307 mm
- Tyre, front: AT 24 x 8-12
- Tyre, rear: 140/80-18M/C 70R
- L x W x H: 2,180 x 815 x 1,260 mm
- Steering angle L R: 42° / 42°
- Wheel base: 1,480 mm
- Ground clearance: 335 mm
- Fuel capacity: 6.2 litres
- Seat height: 955 mm
- Curb mass: 113.8 kg
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