FIRST LOOK! 2020 KAWASAKI KX250 (ALL-NEW), KX450, KX100, KX85 & KX65
2020 KAWASAKI KX250 DIRT BIKE
The 2020 Kawasaki KX250.
The Kawasaki KX250 has more AMA motocross and Supercross success than any other manufacturer in its class and returns for 2020 with a list of enhancements. The 2020 model offers a new engine with improvements inspired by Kawasaki’s racing efforts for more top end power, as well as better handling thanks to a revised chassis and new KYB suspension components. The KX250 has a championship heritage that boasts 17 AMA professional titles and more than 160 race wins since 2004.
The most powerful KX250 engine to date comes by the way of a revised bore and stroke, valve train designed by Kawasaki’s World Superbike engineers and bridged-box piston that is inspired by Kawasaki’s factory racing efforts. Complementing the increased power is an updated slim aluminum perimeter frame with new lower front engine mounts and a new 48 mm KYB coil-spring front fork and rear shock unit that allow for precise tuning.
Color: Lime Green
WHAT IS NEW ON THE 2020 KX250?
1. Revised bore and stroke.
2. Finger-follower valve actuation.
3. Larger-diameter intake and exhaust valves.
4. Larger-bore high performance piston.
5. Low-friction crankshaft pin plain bearings.
6. Stronger cam chain and relocated cam chain tensioner.
7. Shorter intake funnel.
8. Larger throttle body.
9. Shorter exhaust system design.
10. Lower front engine mounts.
11. 48 mm KYB coil-spring fork
12. KYB shock unit complements front fork.
13. Rear suspension link
14. Stiffer front and rear spring rates
15. Revised front brake pad material
16. Larger-diameter 250 mm rear disc
17. Rear brake master cylinder
Acclaimed for its high output and smooth power delivery, the KX250 features a new engine with improved power, an even more potent high rpm range and a higher rev limit. Tuned to best suit race-experienced riders, the 249cc liquid-cooled, four-stroke engine focuses on more top-end rev thanks to improvements by Kawasaki’s factory racing efforts. The new engine features a revised bore and stroke that measures 78.0 x 52.2 mm. The wider bore enables the use of larger intake and exhaust valves and provides greater flow for high rpm performance.
Like the design found on the KX450 motorcycle, the KX250 now utilizes the finger-follower valve actuation. This design increases the rev limit and allows for the use of more aggressive cam profiles, which contributes to high rpm performance. The change to finger-follower valve actuation reduces the valve train mass compared to a tappet-style actuation. A diamond-like carbon coating on the finger followers helps protect against wear. Complementing the more aggressive cams are larger-diameter intake and exhaust valves with increased lift, flowing more air and contributing to improved power. Straighter intake ports contribute to increased intake efficiency. The new cams benefit from a thin and highly durable gas soft-nitride treatment to reduce wear and increase high rpm reliability. Lightweight titanium valves reduce reciprocating weight and offer high rpm reliability. The cylinder is offset 3mm forward, reducing mechanical loss and increasing engine performance. Further increasing reliability is a stronger cam chain and relocation of the cam chain tensioner to the cylinder head, which offsets the increased loads from the more aggressive camshafts and higher revving engine.
A plateau honing process of the cylinder bore results in a smooth surface with good oil-retention. The smooth surface also helps to reduce mechanical loss and improve power. A new, larger-bore, high-performance piston features the same design used by Kawasaki’s factory racers and contributes strong performance at all rpm. A short skirt, reinforced external ribs and the use of a bridged-box piston, featuring internal bracing, allow for a lightweight and strong piston design. The piston’s revised crown design helps achieve the engine’s higher compression ratio, while a dry film lubricant coating on the piston skirts reduces friction at low rpm and helps with the piston bedding-in process. To reduce mechanical loss and lift overall performance, the crankshaft pin has been fitted with new low-friction plain bearings.
The airbox construction has been revised and features a shorter, tapered intake funnel, contributing to increased high rpm performance. The KX250 remains the only production motocross bike with dual injectors, an injector downstream of the throttle valve that is tasked with delivering a smooth, instant response, and a second, upstream injector located close to the airbox for a significant contribution to engine output at high rpm. The exhaust system length has been shortened to help increase high rpm performance and the hydro-formed joint pipe now features a reverse taper design. A larger throttle body flows a greater volume of air and provides a boost in high rpm performance. Adding to Kawasaki’s engineering efforts for increased airflow is the repositioning of the intake duct for an even straighter approach for intake air. The downdraft-style intake routing increases the intake air’s approach angle into the cylinder, improving cylinder-filling efficiency and increasing the engines power.
Contributing to the race-winning engine characteristics, the digital fuel injection system of the KX250 features a coupler package. Each KX250 motorcycle comes standard with three different couplers, easily allowing riders to select pre-programmed fuel injection and ignition mapping to suit their riding style or track conditions. The four-pin DFI couplers select maps that are designed for standard, hard or soft terrain settings. Changing the engine map is as simple as connecting the coupler cap of choice. For riders looking to fine tune their ECU settings, the KX FI Calibration Kit (Handheld) is offered as a Kawasaki Genuine Accessory, and provides access to the fully programmable ECU. The handheld device eliminates the need for a trackside laptop and gives riders the ability to create custom maps for precise adjustment of fuel and ignition settings. The user-friendly device can store up to seven preset maps and is PC-compatible.
The launch control system of the KX250 motorcycle is a major advantage and favorite for riders who are focused on getting to the first turn ahead of their competition. The push-button activation retards ignition timing in first and second gear, helping maximize traction on slippery surfaces like concrete starting pads and put the bike’s potent power to the ground. Once the rider shifts into third gear, normal ignition mapping immediately resumes and full power is restored.
The slim aluminum perimeter frame uses a lightweight construction composed of forged, extruded and cast parts that contribute to light, nimble handling. Thanks to new lower front engine mounts, changing from a through bolt to stud bolts at the front of the crankcase, the overall frame rigidity has been revised with improved ability to absorb bumps. The center of gravity and key dimensions such as swingarm pivot, output sprocket and rear axle locations have all been carefully selected so that the rear tire drives the bike forward.
SUSPENSION & BRAKES
For 2020, the KX250 is equipped with new large diameter 48 mm KYB inverted coil-spring front forks that offer improved action at the initial part of the fork stroke. The forks feature large-diameter inner tubes, enabling the use of 25 mm damping pistons and delivering smooth action and firm damping. A Kashima Coat on the forks’ outer tubes creates a hard, low-friction surface to help prevent wear abrasion on the inside of the tubes, ensuring the sliding surfaces remain smooth over time, while protecting the outside against corrosion. The lubricating material in the coat contributes to smoother suspension action and a better overall ride feel.
On the rear, a new KYB shock unit complements the new front fork. The rear shock features dual compression adjustability, which allows high-speed and low-speed damping to be tuned separately. Kashima Coat on the tank cylinder helps prevent wear abrasion and reduces friction for smoother suspension action. A new Uni-Trak rear suspension system mounts the suspension arm below the swingarm, allowing a longer rear suspension stroke. The longer stroke allows for more precise suspension tuning. In order to match the KX250’s more powerful engine, the front forks and rear shock feature stiffer overall spring rates.
Contributing to the numerous factory-style racing components on the KX250 motorcycle are petal disc brakes. Up front is an oversized 270 mm Braking® brand rotor, which delivers strong braking force and superb control. A revised front brake pad material, like that found on the KX450, delivers linear brake force application, helping to facilitate control.
On the rear, a new larger-diameter 250 mm Braking brand disc contributes to stronger stopping power, complementing the large front disc. A lighter rear brake master cylinder, like those found on the KX450 motorcycle, powers the larger disc. The petal style discs contribute to both sporty looks and help deflect debris. A rear caliper guard helps protect the caliper from damage.
ERGO-FIT Adjustable Components
Kawasaki continues its unmatched commitment towards providing riders with class-leading comfort thanks to its ERGO-FIT adjustable handlebar mounting system and footpegs to fit a variety of riders and riding styles. The handlebars feature four-way adjustable mounts. The multi-position 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 taller riders are seated.
BODYWORK & SEAT
Complementing the improved power and precise handling of the KX250 is minimalistic bodywork that includes slim radiator shrouds for an aggressive race-ready look. A flat fuel tank and seat design help to aid in a more seamless design, making it easy for riders to move around on top of the bike.
For 2020, the number plates and airbox of the KX250 motorcycle have been updated to the color green, resembling the same look found on the bikes used by the factory racing team. The front and rear fenders and fork guards implement a sharp design that makes the bike look more compact. Adding to the distinctive Kawasaki factory race team look is a green oil cap, generator cover plugs, green alumite suspension adjusters and black alumite rims.
2020 KAWASAKI KX450
2020 Kawasaki KX450.
Completely redesigned from the ground up last year, the KX450 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.
Color: Lime Green
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 transmission 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 precise 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.
SUSPENSION & BRAKES
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 unmatched 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 talLer riders are seated.
BODYWORK & SEAT
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 that make it easy to slide back and forth.
Despite its smaller stature, the powerful 99cc two-stroke engine in the KX100 motorcycle resembles the jaw dropping “big bike” look of its larger KX counterparts, while maintaining its ability to outperform the competition. Designed using the same championship winning technology as Kawasaki’s full-size motocross models, an adjustable handlebar mounting system allows for riders to place themselves in the best ride position. Backed by winning performance from Kawasaki Team Green, the KX100 has been a natural step for the riders who are looking to make the transition from the 85cc class to a full-size motocross bike.
Color: Lime Green
The KX85 motorcycle defines a “big bike in a small package” and has been strategically developed to meet the standards of youth racers searching for the upper hand over the competition. Embedded with the performance and winning technology of the KX lineup, the KX85 relies on its instantaneous power, nimble handling, and factory-race inspired styling to reach the checkered flag first.
The two-stroke, single cylinder 85cc engine is equipped with the highly advanced KIPS powervalve system that generates an easy-to-use wide-spread powerband. Championship performance requires power and reliability, which is exactly why the KX85 stands above the competition.
Color: Lime Green
The KX65 is the most compact bike in the Kawasaki KX lineup, built to serve as the machine of choice for aspiring motocross racers driven to follow in Kawasaki’s championship footsteps. The durability and reliability the KX models are known for creating a dependable platform for starting off in racing. Featuring a six-speed transmission, race-ready engine, strong stopping power, and superb handling, the KX65 grooms champions.
Its liquid-cooled, two-stroke 65cc engine and light weight chassis delivers strong controllable power and exceptional handling that is the ultimate recipe for winning races. The 33mm front forks and four-way adjustable rebound damping are capable of performing at the highest level in aggressive terrain, while the rear is fitted with Kawasaki’s Uni-Trak single-shock system with adjustable rebound damping and fully adjustable spring preload.
Color: Lime Green