2026Kawasaki KX 450SR

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The 2026 Kawasaki KX450 SR is a competition-focused motocross bike engineered for serious racers and advanced riders seeking reliable performance. Its liquid-cooled 449cc four-stroke engine delivers consistent power through a five-speed transmission, while the advanced fuel injection system ensures precise throttle response across all conditions. Built for victory on the track, this machine combines lightweight agility with championship-proven engineering.

Capacity: 449.0 ccm
Engine: Single, four-stroke
Gearbox: 5-speed
Dry weight: 105.6 kg
Seat height: 955 mm
Power: 56.0 HP (41.2 kW)

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Other years 2022 2023 2024 2025 2026

How it rides

Editorial estimate from the spec sheet - not lab tested

Off-road & trail98%

Cornering95%

City riding5%

Daily riding10%

Touring5%

Two-up0%

Track85%

Best for: Built purely for motocross racing and closed-course off-road riding, with a titanium race exhaust, traction/launch control and fully adjustable suspension aimed at podium performance.
Built for: A razor-sharp, high-revving single-cylinder race weapon that rewards aggressive input with explosive acceleration and pinpoint cornering agility on dirt.
Not ideal for: This bike is not suited for daily commuting, highway touring, passengers, or riders wanting comfort and low maintenance.

Scores are derived from the spec sheet using the same model across every bike, so they compare like for like.

Will it fit you?

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Your height

Inseam (optional)

Units

At 955mm, a rider of 68.9" with a 31" (estimated) inseam will not reach the ground comfortably on the 2026 Kawasaki KX 450SR, with a cramped knee angle of around 85 degrees and an upright riding position.

Assumes about 30mm of suspension sag once seated. This is an approximation from category-typical geometry, not a measurement of this bike or of you - sit on one before you buy.

More bikes at over 900 mm — Sky High →

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Full specifications

Engine

Capacity: 449.0 ccm
Power: 56.0 HP (41.2 kW)
Engine type: Single, four-stroke
Power/weight ratio: 0.5303 HP/kg (dry)
Bore x stroke: 96.0 x 62.0 mm
Compression: 12.5:1
Cooling system: Liquid
Fuel system: Injection
Starting: Electric
Ignition: Digital CDI with 3 Coupler Options

Transmission

Gearbox: 5-speed
Transmission type: Manual
Final drive: Chain
Clutch: Wet multi-disc, manual

Dimensions & weight

Wheelbase: 1486 mm
Overall length: 2184 mm
Overall width: 820 mm
Overall height: 1270 mm
Seat height: 955 mm
Dry weight: 105.6 kg
Wet weight: 112.5 kg
Fuel capacity: 6.20 litres
Ground clearance: 340 mm

Chassis & suspension

Frame: Aluminum perimeter
Front suspension: 49mm inverted telescopic coil-spring fork with 16-way compression damping and 16-way rebound damping
Rear suspension: Uni-Trak® gas charged shock with piggyback reservoir with dual-range (4 turns stepless high speed/19-way low-speed) compression damping, 38-way rebound damping and adjustable preload
Front wheel travel: 305 mm
Rear wheel travel: 307 mm
Rake (fork angle): 26.6°
Trail: 114 mm

Brakes & wheels

Front brakes: Single disc. Dual pistons.
Front brakes diameter: 270 mm
Rear brakes: Single disc. Single-piston caliper.
Rear brakes diameter: 240 mm
Front tyre: 80/100-21
Rear tyre: 120/80-19

Other

Color options: Lime Green
Comments: Smartphone connectivity. Traction control. Launch control. Power modes. Racing components. Special tuning.

Compiled from manufacturer documentation and user contributions, corrected on an ongoing basis. Spotted something wrong? Tell us.

What changed, year to year

Differences highlighted

Specification	2022	2023	2024	2025	2026
Capacity	449 cc	449 cc	449 cc	449 cc	449 cc
Dry weight	106 kg	106 kg	106 kg	106 kg	106 kg
Seat height	955 mm	955 mm	955 mm	955 mm	955 mm
Fuel capacity	6.2 L	6.2 L	6.2 L	6.2 L	6.2 L