2020 Kawasaki KX450 Guide

2020 Kawasaki KX450

2020 Kawasaki KX450 2020 Kawasaki KX450 2020 Kawasaki KX450


2020 Kawasaki KX450:

For decades, Kawasaki KX motorcycles have established a legacy of building champions. Keeping with this legacy is the KX450.  Equipped with a powerful engine, race-ready suspension, and electric start, the all-new KX450 is built for the top of the podium.


2020 Kawasaki KX450 Totalmotorcycle.com Key Features

With 2020 Kawasaki KX™450 motorcycles, the top step of the podium is within your grasp. KX450 motorcycles are infused with cutting-edge technology derived from Kawasaki factory race teams. Feel the difference of the powerful 449cc engine and lean chassis as you lead the competition. From the gate to the checkered flag, the KX450 is built to win.

  • Powerful 449cc 4-stroke engine
  • 49mm Showa coil spring front fork with A-KIT Technology
  • Uni-Trak® rear suspension
  • Hydraulic clutch
  • Electric start
  • ERGO-FIT® technology
  • Lightweight frame and swingarm
  • Launch Control Mode


Built to Win

Delivering strong, responsive power, the engine of the KX™450 motorcycle features a finger-follower valve train. Crafted with the same design used by Kawasaki factory race teams, the 449cc engine produces broad torque and strong power across the entire rev range.



Race-Ready Suspension

49mm Showa Coil Spring Front Fork combined with A-KIT Technology deliver superb suspension and handling. Large-diameter inner tubes allow the use of large damping pistons for race-winning performance while a large-diameter front axle improves front-wheel traction. The Uni-Trak® rear suspension system ensures optimal rear-wheel traction.



Advanced Stopping Power

The most advanced KX™450 motorcycle yet features stopping power to match its incredible acceleration capability. Up front, an oversized 270mm Braking® petal disc with dual-piston caliper offers sharp response and a strong, consistent feel. In the rear, a large-diameter 250mm Braking® petal disc complements the front for race-ready performance.



Perfect Fit

Find your best performance with the Kawasaki ERGO-FIT® advantage. Four handlebar positions and two footpeg positions allow you to tailor the KX™450 motorcycle to your body size, riding style and preference. Wide footpegs ensure excellent grip for optimum comfort and control.



Reliable Starting

Conserve energy and ride smarter with an electric start and hydraulic clutch. A lithium-ion battery ensures strong and reliable starting performance, eliminating the need for a backup kickstarter. The hydraulic clutch offers a direct feel and consistent actuation even as engine temperatures rise while also offering a light pull at the lever.




2020 Kawasaki KX450 Totalmotorcycle.com Features and Benefits

Completely redesigned from the ground up last year, the KX™450 motorcycle returns for 2020 as the flagship model in the Kawasaki KX™ lineup. Tuned to best suit race-experienced riders, the 449cc liquid-cooled, four-stroke engine, slim aluminum perimeter frame, Showa A-KIT technology suspension, hydraulic clutch and electric start are the ultimate combination of a championship winning package.

The KX450 is built with race-winning components to help Kawasaki riders get to the top step of the podium. From the showroom to the racetrack, the performance of Kawasaki’s KX™ family of motorcycles is proof of its engineering pedigree. It truly is the Bike that Builds Champions.



The four-stroke, single cylinder, DOHC, water-cooled 449cc lightweight engine package utilizes input derived directly from the factory race team, producing peak power and a torque curve that makes it easy to get on the gas early. The potent KX450 engine features an electric start, which is activated by the push of a button and powered by a compact Li-ion battery.

Kawasaki brought top-level road racing technology to the KX450 valve train, using designs from Kawasaki World Superbike engineers. It uses finger-follower valve actuation, enabling larger-diameter valves and more aggressive cam profiles. The intake and exhaust valves are formed from lightwight titanium, while a bridged-box piston uses the same design as the Monster Energy® Kawasaki race team’s factory motorcycles.


A close-ratio five speed transmission features lightweight gears and shafts to keep weight down, yet retain strength, while contributing to the motorcycle’s winning performance. The transmision is paired with a hydraulic clutch that is designed to provide a consistent feeling through minimal change in play as the clutch heats up during heavy use.



An industry-leading slim aluminum perimeter frame provides pecise cornering through excellent front-end feel and the ultimate agility when riding at high speeds. The frame’s lightweight construction is composed of forged, extruded and cast parts, while the engine is used as a stressed member and adds to the frames rigidity balance. A lightweight alloy swingarm is constructed of a cast front section and twin tapered hydro-formed spars in a raw aluminum finish, complementing the frame. Engineers carefully placed the dimension of the swingarm pivot, output sprocket and rear axle locations, helping to focus on center of gravity and balanced handling.



High-performance Showa 49 mm coil spring front forks with A-KIT technology can be found up front, featuring large diameter inner tubes that are the same size as those found on Kawasaki’s factory racing team’s machines. The forks enable the use of large damping pistons for smooth action and firm damping.


On the rear, a Kawasaki Uni-Trak® linkage system is designed to work in conjunction with the Showa shock, aluminum frame and swingarm. The linkage, which is mounted below the swingarm, allows for a longer rear suspension stroke and more precise rear suspension tuning. The Showa Compact Design rear shock boasts A-KIT technology with bigger diameter compression adjuster, improving on the high frequency movements found on today’s motocross tracks.


An oversized 270 mm, petal-shaped front brake rotor from the renowned manufacturer, Braking®, is fitted to keep up with the powerful engine of the KX450. The rear is equipped with a 250 mm petal-shaped Braking rotor that matches the large front disc.



Kawasaki continues its umatched commitment towards providing riders with class-leading ERGO-FIT™ comfort thanks its adjustable handlebar mounting system and footpegs to fit a variety of riders and riding styles. The handlebars feature four-way adjustable mounts. The multi-positition handlebars offer two mounting holes with 35 mm of adjustability, and the 180-degree offset clamps boast four individual settings to suit different size riders. The footpegs feature dual-position mounting points, with a lower position that reduces the standard setting by an additional 5 mm. The lower position effectively lowers the center of gravity when standing, and reduces knee angle when tallers riders are seated.



Complementing the championship proven technology, the 2020 KX450 features aggressive styling along with in-mold graphics on the radiator shrouds that result in an ultra-smooth surface and racy look needed to finish at the top of its class. The sleek bodywork has been molded to mach the V-mounted radiators and narrow chassis design. Each piece of the bodywork has been designed to help facilitate riders movement with long, smooth surfaces tha make it easy to slide back and forth.



2020 Kawasaki KX450 – Totalmotorcycle.com USA Specifications/Technical Details
US MSRP Price: $9299 USD
Canada MSRP Price: $10499 CDN
Europe/UK MSRP Price: £7599 GBP (On The Road inc 20% Vat)



4-stroke, 1-cylinder, DOHC, water-cooled



Bore x Stroke

96.0 x 62.1mm

Compression Ratio


Fuel System

DFI® with 44mm Keihin throttle body


Digital CDI with electric start


5-speed, return shift

Final Drive



Front Suspension / Wheel Travel

49mm inverted coil-spring telescopic fork with adjustable compression and rebound damping/12.0 in

Rear Suspension / Wheel Travel

New Uni-Trak® with adjustable dual-range (high/low-speed) compression damping, adjustable rebound damping and adjustable preload/12.1 in

Front Tire


Rear Tire


Front Brakes

Single semi-floating 270mm Braking® petal disc with dual-piston caliper

Rear Brakes

Single 250mm Braking® petal disc with single-piston caliper


Frame Type

Aluminum perimeter


27.6°/4.8 in

Overall Length

86.0 in

Overall Width

32.7 in

Overall Height

50.2 in

Ground Clearance

13.4 in

Seat Height

37.6 in

Curb Weight

232.3 lb without fuel / 242.4 lb**

Fuel Capacity

1.64 gal


58.5 in

Color Choices

Lime Green


Not Available

Kawasaki Protection Plus™ (optional)

Not Available





2020 Kawasaki KX450 – Totalmotorcycle.com  Canadian Specifications/Technical Details


Displacement 449cc
Type 4-stroke, Single
Bore and stroke 96.0 x 62.1 mm
Cooling Liquid
Compression ratio 12.8:1
Valve system DOHC, 4 valves
Fuel system Fuel injection (44 x 1)
Ignition Digital DC-CDI
Lubrication Forced lubrication (semi-dry sump)
Starting Electric


Front: type Single semi-floating 270 mm petal disk
Front: calipers Dual-piston caliper
Rear: type Single 250 mm petal disc
Rear: calipers Single-piston caliper


Overall length 2,195 mm
Overall width 830 mm
Overall height 1,275 mm
Wheelbase 1,485 mm
Ground clearance 340 mm
Seat height 955 mm
Curb mass** 105.4 kg (dry)
Fuel capacity 6.2 litres


Transmission 5-speed, return
Final drive Chain
Primary reduction ratio 2.727 (60/22)
Gear ratio: 1st 1.750 (28/16)
Gear ratio: 2nd 1.412 (24/17)
Gear ratio: 3rd 1.188 (19/16)
Gear ratio: 4th 1.000 (19/19)
Gear ratio: 5th 0.875 (21/24)
Final reduction ratio 3.846 (50/13)
Clutch Wet multi-disc, manual


Type Perimeter, Aluminum
Wheel travel: front 305 mm
Tire: front 80/100-21 51M
Wheel travel: rear 307 mm
Tire: rear 120/80-19 63M
Caster (rake) 28°
Trail 122 mm
Steering angle (left/right) 42°/42°


Suspension, front ø49 mm inverted telescopic fork with adjustable compression and rebound damping
Suspension, rear New Uni-Trak with adjustable dual-range (high/low speed) compression damping, adjustable rebound damping and adjustable preload



2020 Kawasaki KX450 – Totalmotorcycle.com European Specifications/Technical Details


Engine type

Liquid-cooled, 4-stroke Single


449 cm³

Bore x stroke

96 x 62.1 mm

Compression ratio


Valve system

DOHC, 4 valves

Fuel system

Fuel injection: Ø 44 mm x 1


Digital DC-CDI

Starting System



Forced lubrication, semi‑dry sump




Final drive


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)


Wet multi-disc, manual

Brakes & Suspension

Brakes, front

Single semi-floating 270 mm petal disc. Caliper: Dual-piston

Brakes, rear

Single 250 mm petal disc. Caliper: Single-piston

Suspension, front

49 mm inverted telescopic fork with adjustable compression and rebound damping.

Suspension, rear

New Uni-Trak with adjustable dual-range (high/lowspeed) compression damping, adjustable rebound damping and adjustable preload.

Frame & Dimensions

Frame type

Perimeter, aluminium


122 mm

Wheel travel front

305 mm

Wheel travel rear

307 mm

Tyre, front

80/100-21 51M

Tyre, rear

120/80-19 63M

Steering angle, left / right

42° / 42°

L x W x H

2,185 x 830 x 1,275 mm


1,485 mm

Ground clearance

340 mm

Fuel capacity

6.2 litres

Seat height

955 mm

Curb mass

110.0 kg




Manufacturer Specifications and appearance are subject to change without prior notice on Total Motorcycle (TMW).

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