Motocross Bikes
2027Kawasaki KX450X
32 fields on record
The 2027 Kawasaki KX450FX, renamed from KX450X, is Kawasaki's cross-country racer for intermediate to expert off-road riders. The new generation brings a revised 449cc single, a new aluminium frame, new suspension and Brembo brakes, with a 5-speed gearbox and a 7.5-litre tank. It suits GNCC-style racing more than the motocross track.
- Capacity
- 449.0 ccm
- Engine
- Single, four-stroke
- Gearbox
- 5-speed
- Dry weight
- Not on record
Know it? Add it → - Seat height
- Not on record
Know it? Add it → - Power
- 56.0 HP (41.2 kW)
What’s new for the 2027 Kawasaki KX450X
vs the 2026| Spec | 2026 | 2027 |
|---|---|---|
| Dry weight | 107.0 kg (235.9 pounds) | not listed |
| Wet weight | 113.4 kg (250.0 pounds) | not listed |
| Seat height | 950 mm (37.4 inches) | not listed |
| Fuel capacity | 6.20 litres (1.64 US gallons) | 7.50 litres (1.98 US gallons) |
| Front suspension | 49mm inverted telescopic coil-spring fork with 16-way compression damping and 16-way rebound damping | Showa 49 mm coil-spring inverted fork |
| 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 | New Uni-Trak, dual-range compression |
| Front brakes | Single disc. Semi-floating petal discs | Brembo dual-piston caliper, petal disc |
| Rear brakes | Single disc. Single-piston caliper. | Brembo single-piston caliper, petal disc |
| Wheelbase | 1481 mm (58.3 inches) | not listed |
| Compression | 12.5:1 | 12.7:1 |
How it rides
Editorial estimate from the spec sheet - not lab tested- Best for
- Built specifically for cross-country and off-road racing, with a wide-ratio gearbox, larger fuel capacity, and chassis geometry tuned for extended off-road stability rather than motocross jumps or street use.
- Built for
- It has the raw, high-strung, minimalist character of a purpose-built race bike: light, responsive, and demanding rather than forgiving.
- Not ideal for
- This is not a suitable choice for commuting, highway touring, carrying a passenger, or riders seeking plush comfort and low-maintenance road-going practicality.
Scores are derived from the spec sheet using the same model across every bike, so they compare like for like.
Engine
- Capacity
- 449.0 ccm
- Power
- 56.0 HP (41.2 kW)
- Engine type
- Single, four-stroke
- Bore x stroke
- 96.0 x 62.1 mm
- Compression
- 12.7:1
- Cooling system
- Liquid
- Fuel system
- Injection
- Starting
- Electric
- Ignition
- Digital DC-CDI
- Lubrication system
- Forced lubrication, semi-dry sump
Transmission
- Gearbox
- 5-speed
- Transmission type
- Manual
- Clutch
- Wet multi-disc, manual
Dimensions & weight
Chassis & suspension
- Frame
- Perimeter, aluminum
- Front suspension
- Showa 49 mm coil-spring inverted fork
- Rear suspension
- New Uni-Trak, dual-range compression
- Front wheel travel
- 305 mm
- Rear wheel travel
- 307 mm
- Rake (fork angle)
- 27.0°
- Trail
- 117 mm
Brakes & wheels
- Front brakes
- Brembo dual-piston caliper, petal disc
- Front brakes diameter
- 270 mm
- Rear brakes
- Brembo single-piston caliper, petal disc
- Rear brakes diameter
- 240 mm
- Front tyre
- 80/100-21
- Rear tyre
- 120/80-18
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 | 2021 | 2023 | 2024 | 2026 | 2027 |
|---|---|---|---|---|---|
| Capacity | 449 cc | 449 cc | 449 cc | 449 cc | 449 cc |
| Dry weight | 107 kg | 107 kg | 107 kg | 107 kg | — |
| Seat height | 950 mm | 950 mm | 950 mm | 950 mm | — |
| Fuel capacity | 6.2 L | 6.2 L | 6.2 L | 6.2 L | 7.5 L |
Illustrative - generated automatically by diffing the year records already on file, not a manufacturer-published changelog.
Rider Reviews
Common questions
What is the engine size of the Kawasaki KX450X?
The 2027 Kawasaki KX450X has a Capacity of 449.0 ccm (27.40 cubic inches).
What engine power does the Kawasaki KX450X have?
The 2027 Kawasaki KX450X has a Power of 56.0 HP (41.2 kW).
How many gears does the Kawasaki KX450X have?
The 2027 Kawasaki KX450X has a Gearbox of 5-speed.
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