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Kawasaki 2021 KX450 Dirt Bike Review Specs Price

For 2021, the Kawasaki 2021 KX450 Dirt Bike motorbike returns to the Kawasaki KX range as the flagship model, with various new improvements to maintain its position as the class leader. The 449cc liquid-cooled, four-stroke engine with high engine power, sleek aluminum parameter frame, Showa A-Cat technology suspension, updated hydraulic clutch, and electric start is the ultimate combination of championship-winning packages, according to the best suit race.

To enable the Kawasaki riders to reach the top of the podium, the Kawasaki 2021 KX450 Dirt Bike is equipped with race-winning components. The KX450 will get a new Cond Disc-Spring hydraulic clutch and 1-1 / 8 “Renthal® Fatbar® handlebar along with engine improvements for 2021.

Kawasaki 2021 KX450 Dirt Bike

The performance of Kawasaki’s KX motorbikes is a testament to its engineering prowess from showroom to race track. The bike is what makes champions.

KX is synonymous with winning the title, having won more Supercross and Motocross titles than any other manufacturer. The KX450 motorcycle is at the top of the KX range, specifically designed to dominate the track. We’ve learned what it takes to conquer and stay on top for the last four decades. Our commitment to making the ultimate machine is clear, and the KX450 is a testament to that.

Kawasaki 2021 KX450 Dirt Bike – Features and Specs

  • Robust and lightweight chassis with electric start
  • Compatibility with ERGO-FIT®
  • Industry-leading slim aluminum frame from DFI® Couplers
  • Suspension Showa A-KIT technology
  • We increased engine performance with the UNI-TRAK® linkage system.
  • New hydraulic clutch with disc-spring
  • Winning power and performance

The KX450 engine for 2021 is more powerful and produces broad, usable torque and robust and responsive power throughout the rpm band. This race-ready motorcycle is designed to stay ahead of the pack from the starting gate to the final line.

Return them to the dust

Take the lead with a track record of winning races. The suspension setup is highly adjustable and provides smooth movement, firm damping, and maximum traction.

Advanced stopping power with next-level technology

The incredible speed capability is comparable to the next level of stopping power. A 270mm braking petal disc containing a dual-piston caliper provides quick response and a robust and consistent feel. For race-ready performance, a large diameter 250mm braking petal disc meets the front.

Kawasaki 2021 KX450 Dirt Bike

Confidence in your ride

The KX450 motorcycle has excellent features that impress confidence, from a fast and reliable start to superior braking power. In addition, the championship car is backed by decades of racing skills.


The Monster Energy® Kawasaki race team provided input for the four-stroke, single-cylinder, DOHC, water-cooled 449cc lightweight engine package, which produces peak power and torque profile that makes it easy to jump quickly on gas. The powerful KX450 engine features an electronic start system that is powered by a button and is powered by a small Li-ion battery.

The KX450 Valve Train is designed by Kawasaki World Superbike Engineers and uses state-of-the-art road racing technology. Finger follower valve activation lets larger valve diameters and more aggressive cam profiles. The new intake and exhaust valves are lightweight titanium, and the Bridged Box Piston Race Team is based on the factory bike.

With lightweight gears and shafts, the close-proportion five-speed transmission contributes to the motorcycle’s winning performance by reducing the weight while maintaining power. For 2021, the transmission will be paired with a new high-capacity cond disk-spring hydraulic clutch. The coil springs in the clutch have been replaced with conical disc springs, resulting in a lighter grip when the lever is pulled and a more comprehensive range of clutch engagement to help control. Larger clutch plates and better friction materials aim to maintain a lasting feeling as the clutch heats up during intense use. When the clutch is pulled in, the brand-new friction plates have off-seat segments to help separate the crisp disc and reduce drag.


When riding at high speeds, the industry-leading compact aluminum perimeter frame enables accurate cornering through excellent front-end feel and agility. The new lightweight frame is made up of forged, extruded, and cast sections; its engine acts as a pressure part that contributes to the rigidity of the frame. A lightweight alloy swing arm defines the frame with twin tapered hydroformed spars in the cast front section and raw aluminum finish. The dimensions of the swing arm pivot, the output sprocket, and the rear axle locations were carefully chosen by the engineers to focus on gravity and balanced handling.

Kawasaki 2021 KX450 Dirt Bike

Brakes and suspensions

On the high-performance front, the Showa with A-KIT technology has 49mm coil spring front forks, with much larger diameter inner tubes that are the same size as those used by Kawasaki Factory Racing Squad (KRT). Large damping pistons can be easily used in forks for firm movement and firm damping.

A new Uni-Trak® linkage system at the rear is designed to work with shovel shock, aluminum frame, and swing arm. The bottom swing arm linkage allows a longer rear suspension stroke and more accurate rear suspension tuning.

Set and bodywork

In addition to the championship-proven technology, the 2021 KX450 radiator has aggressive styling and in-mold graphics on the shrouds, resulting in exceptionally smooth surfaces and racial shape finishing at the top of its class. The slim bodywork was designed to complement V-mounted radiators and trim chassis. With extended, softer surfaces that make it easy to move back and forth, each piece of bodywork aims to help riders move.

Kawasaki 2021 KX450 Dirt Bike – Price

The new Kawasaki 2021 KX450 Dirt Bike is available at $9,399 only.

Kawasaki 2021 KX450 Dirt Bike

Kawasaki 2021 KX450 Dirt Bike – Technical Specifications


Engine 449cc, liquid-cooled, DOHC, 4-stroke, 4-valve single
Bore x Stroke 96mm x 62.1mm
Compression Ratio 12.5:1
Fuel System Fuel injection: 44mm x 1
Ignition Digital DC-CDI
Starting Electric
Lubrication Forced lubrication, semi-dry sump
Transmission Five-speed, return
Clutch Wet multi-disc, manual
Final Drive Chain


Frame Perimeter, aluminum
Front Suspension / Wheel Travel 49mm inverted fork with adjustable compression and rebound damping / 305mm (12 inches)
Rear Suspension / Wheel Travel New Uni Trak includes adjustable dual-range (high/low-speed) compression damping, adjustable rebound damping, and adjustable preload / 307mm (12.1 inches)
Rake / Trail 27.6-degree / 122mm
Steering Angle (L/R) 42-degree / 42-inch
Front Tire 80/100-21 51M
Rear Tire 120/80-19 63M
Front Brake A single semi-floating 270mm petal disc features a dual-piston caliper
Rear Brake 250mm petal disc containing single-piston caliper

Kawasaki 2021 KX450 Dirt Bike


Dimensions (L x W x H) 2,185 x 820 x 1,265 mm (86.0 x 32.3 x 49.8 in)
Wheelbase 1,485 mm (58.5 in)
Road Clearance 340 mm (13.4 in)
Seat Height 955 mm (37.6 in)
Curb Mass 110.2 kg (243 lb)
Mass Without Fuel 105.6 kg (233 lb)
Fuel Capacity 6.2 liters

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