The Kawasaki KLX 140 was developed with the direct help of some of the best motocross riders. Fortunately the result was even better than expected and the KLX 140 won its place among the best play bikes in its class. Moreover thanks to its versatile character the Kawasaki KLX 140 can be used without problems by both yang and old riders.
Featuring an attractive design with big footpegs, rubber mounted handle bars and a set of tasty KX-Style wheels the Kawasaki KLX 140 is ready to deal with any type of terrain with poise.
The bike is powered by a 144cc Four-stroke, SOHC, two-valve engine which can be started by means of an (keyless) electric starter button mounted conveniently on the handlebar.
Power is sent to the wheel using a close ratio transmission helped by a progressive manual clutch. Up front the bike is fitted with a 33mm telescopic fork featuring custom-tuned spring rate and damping settings handles suspension, while at the back, you’ll find a rear shock equipped with Uni-Trak linkage.
Hit the jump for more information on the Kawasaki KLX 140</i>
Stretching the Envelope of Fun and Adventure
If the standard KLX™ 140 with its 17” front and 14” rear wheels holds appeal for both young and old, the KLX140L incorporates all of its many features, yet packages them in a slightly beefier version, giving taller riders something to crow about. The 19” front and 16” rear wheels on the L-version are only part of the story, as its also equipped with a more performance-oriented , reservoir-type shock that the larger, more experienced rider will quickly appreciate.
Bringing the KLX 140L to life is as simple as pressing the power switch and thumbing the start button. The power switch includes an internal LED to remind riders when the ignition is on, and preventing dead batteries. The powerful 144cc engine is easy to manage via a manual clutch and a five-speed, close ratio transmission. And a progressive clutch means that younger and beginning riders can more easily get the hang of shifting and clutch use; its progressive nature also means half-clutch can be used at extremely low speeds. The clutch also offers a more direct feel and more durability.
The KLX 140L’s high-revving, smooth and surprisingly quiet engine is wrapped in a high-tensile steel perimeter frame covered by KX™-like shrouds, a two-tone seat cover and sharp, aggressive body work. The KLX 140L’s roomy cockpit, overall control layout and narrow footpeg/frame relationship – including wide, comfortable footpegs – make it easy for riders to move around with minimal effort.
A 33mm telescopic fork featuring custom-tuned spring rate and damping settings handles suspension duty up front. In back, a Uni-Trak® linkage equipped rear shock featuring 5-way preload adjustability and a remote reservoir provides a high degree of wheel control, and is adaptable to the smaller-wheeled, standard-spec KLX140 for added performance.
Lightweight RK EXCEL aluminum rims and advanced braking components are another sign this is a serious off-road motorcycle. A large 220mm front disc and 27mm twin-piston caliper at the front and 186mm rear disc provide serious stopping power. Both utilize petal shaped rotors, which help clean the brakes and reduce unsprung weight for better wheel control.
Bottom line? The KLX140L delivers an ideal blend of size and performance, all of which equals Big Fun for kids and adults alike.
Authentic Kawasaki Accessories are available through Kawasaki dealers.
At a Glance
• 144cc air-cooled, single-cylinder engine is simple to operate and to maintain
• Close-ratio transmission makes optimum use of the engine’s power
• Progressive manual clutch offers young riders the chance to master clutch engagement and gear shifting
• Rear shock with piggyback reservoir has fully adjustable preload, four-way compression damping and 22-way rebound damping
• Keyless electric starting via a starter button on the handlebar; an LED indicates when the power button is on to help prevent accidental battery drain
• Front 220mm petal disc and large-bore 27mm twin-piston caliper (same size as those on the KX450F/250F) for strong and easy-to-control braking
• Quiet muffler is equipped with a USFS-approved spark arrester, meaning the KLX140L can access designated public off-road riding areas
144CC Air-Cooled, Single-Cylinder Engine
• Reliable and easy to use lightweight engine is both simple to operate and to maintain
• Engine revs easily and allows riders to use the full rpm range up to the 10,500 rpm rev limiter
• Exhaust pipe is curved to achieve optimum length for good power character
• The quiet muffler is equipped with a USFS approved spark arrester, meaning the KLX140L can access designated public off-road riding areas
• Oil-coated air-filter is washable, reusable, easily accessed and highly effective in dusty situations
• 31.5” seat height accommodates taller riders
• Starting is via a (keyless) electric starter button on the handlebar
• Orange LED light activates when the power button is depressed, indicating that power is “ON”
• Digital CDI ignition helps ensure quick, reliable starts
• Oval piston-valve Keihin PB20 carburetor features several Kawasaki-original modifications to provide stable fuel delivery under rough off-road conditions
• Partitions in the float chamber keep the fuel from sloshing excessively and an umbrella around the main jet traps fuel when jumping
• Dual air vents help provide a stable fuel supply and eliminate hesitation even when the bike is at extreme lean angles
• Needle valve is suspended on a spring that acts like a shock absorber
• Float material is rubber instead of plastic
• Close gear ratios help the KLX 140L’s acceleration performance
• Like the KX models, the shift lever features a ball bearing to ease shifting and has a folding tip for less damage in a crash
Progressive Manual Clutch
• Manual clutch offers young riders the chance to master clutch engagement and gear shifting
• A spring damper in the clutch gives it a 2-stage engagement that permits half-clutch use when riding at extremely low rpm or idling speeds, and helps provide direct clutch feel and better durability
Box-Section Parimeter Frame
• Ready for the off-road abuse, the highly rigid, KX™-inspired high-tensile steel perimeter frame uses the same upper tubes as the KLX250S
• Aluminum swingarm offers light weight, strength and a hairline finish like on the KX machines
• KX-style chain adjusters allow precise chain adjustments
• 33mm telescopic fork assembly has spring rates and damping settings specific to the 140L
• Intended for use at a quicker pace, the KLX140L features a Uni-Trak® linkage and a rear shock with a piggyback reservoir, fully adjustable spring preload, 4-way compression damping and 22-way rebound damping
• Strong, high-grade die-cast hubs offer the same durability as those found on the KX
• Durable, lightweight RK EXCEL aluminum rims on the 19/16-inch front/rear wheels
Petal Disc Brakes Front and Rear
• Front 220mm petal disc and large-bore 27mm twin-piston caliper (same size as those on the KX450F/250F) offer strong and easy-to-control braking
• Rear brake uses a 186mm petal disc gripped by a 27mm single-piston caliper
• Rear brake master cylinder features a large-volume, unitized reservoir that contributes to stable braking and helps ensure sufficient fluid pressure even when the brake pad wears down
• In addition to helping reduce unsprung weight, the wave shapes of the petal discs help clean the brake pads for more efficient braking performance
• Combination of the flat surface of the frame’s box-section, long footpegs mounted close to the bikes’ centerline and no kick-start lever add up to good grip and a high level of machine control
• Footpeg/frame relationship is modeled after the KX line for maximum leg grip
• Handlebar is rubber-mounted for reduced vibration transferred to the rider’s hands
• Two-piece upper triple clamp and handle clamp foster easy aftermarket handlebar installation
• Raised pattern on half of the grip surface offers more control and comfort
• Two-tone seat cover has a slip-resistant top surface for good grip when seated and smooth sides for excellent rider mobility when standing
Sharp, Aggressive Bodywork Styling
• Box-section perimeter frame features advanced styling similar to that found on the KX racers
• Two-piece shrouds with ventilation holes inspired by the top-of-the-line KX race machines
• Fuel tank cover provides a flush transition from tank to shroud, and contributes to the bike’s high level of fit and finish
• Eye-catching box muffler design protrudes as little as possible from behind the side cover, and features a plastic muffler end-cap that offers a surface cooler to the touch than steel
Four-stroke, SOHC, two-valve single
Bore x Stroke
58.0 x 54.4mm
Five-speed with wet multi-disc manual clutch
High-Tensile steel, box-section perimeter
27 degrees / 3.8 in.
Front suspension / wheel travel
33mm telescopic fork / 7.1 in.
Rear suspension / wheel travel
Uni-Trak® linkage system and single shock with piggyback reservoir, fully adjustable preload and 22-way rebound damping / 7.1 in.
Front Tire Size
Rear Tire Size
Front brakes / rear brakes
Single 220mm petal disc with a dual-piston caliper / Single 186mm petal disc with single-piston caliper