Kawasaki KLX 140R F - 2021 Specifications and Reviews

The 2021 Kawasaki KLX 140R F is a lightweight enduro bike ideally suited for young riders and beginners seeking off-road adventure. Its air-cooled 144cc four-stroke engine delivers manageable power for learning fundamental riding skills, while the nimble chassis and low seat height make it accessible for smaller-framed riders exploring trails and dirt terrain.

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General information

CategoryEnduro / offroad
Year2021
ModelKawasaki KLX 140R F
 
 

Engine and Transmission Specifications

ClutchMultiplate, wet
Transmission typeChain   (final drive)
Gearbox5-speed
Cooling systemAir
IgnitionDigital DC-CDI
Fuel controlSingle Overhead Cams (SOHC)
Fuel systemCarburettor. Keihin 20mm
Bore x Stroke58.0 x 54.4 mm (2.3 x 2.1 inches)
Compression9.5:1
Engine typeSingle cylinder, four-stroke
Capacity:144.0 ccm (8.79 cubic inches)

Brakes, suspension, Frame and wheels

Rear brakesSingle disc. Petal disc with single-piston caliper
Diameter220 mm (8.7 inches)
Front brakesSingle disc. Petal disc with a dual-piston caliper
Rear tire90/100-18
Front tire70/100-21
Rear wheel travel201 mm (7.9 inches)
Rear SuspensionUni-Trak® linkage system and single shock with piggyback reservoir, 20-way rebound damping and threaded preload adjustability
Front wheel travel191 mm (7.5 inches)
Front Suspension33mm telescopic fork
Trail117 mm (4.6 inches)
Rake (fork angle)27.0°
Frame typeHigh-tensile steel, box-section perimeter

Physical measures and capacities

Fuel capacity5.68 litres (1.50 US gallons)
Wheelbase1285 mm (50.6 inches)
Ground clearance315 mm (12.4 inches)
Overall width790 mm (31.1 inches)
Overall length1996 mm (78.6 inches)
Overall height1135 mm (44.7 inches)
Seat height861 mm (33.9 inches) If adjustable, lowest setting.
Weight incl. oil, gas, etc99.0 kg (218.2 pounds)

Other specs

MaintenanceFind parts, fluids, filters, maintenance tools and service items on eBay
Factory warranty6 Months
Color optionsLime Green

Performance Profile & Rider Fit

Best For

Track10%
City25%
Cornering30%
Daily Riding20%
Touring12%
Passenger5%

Rider Profile

Best ForThis is a beginner-to-intermediate oriented trail bike, well suited to younger or smaller riders learning off-road fundamentals.
PurposeBuilt for light trail riding, dirt paths, and recreational off-road exploration rather than speed or long-distance travel.
Rider FitIts low seat height, light 99kg weight, and narrow build make it very accessible to smaller or shorter riders and easy to handle at low speeds.
CharacterA nimble, forgiving, air-cooled single that prioritizes easy manageability and confidence-building off-road capability over outright performance.
Not Ideal ForNot suitable for highway travel, two-up touring, or riders seeking strong acceleration and high top speed.

Character map is an editorial estimate based on this bike's specifications, not a lab-tested measurement.

Rider Fit Visualizer

2021 Kawasaki KLX 140R F Rider Ergonomics Assessment

Calculated in your browser only - your height/inseam are never sent to our servers.

Feet:

At 861mm, a rider of 175cm with a 79cm (estimated) inseam will reach the ground with tip-toe one foot on the 2021 Kawasaki KLX 140R F, with a cramped knee angle of around 75 degrees and an upright riding position.

Data quality: measured. Assumes about 30mm of suspension sag once seated (a typical street-bike rule of thumb - stiffer or softer suspension will vary). This is an approximation from category-typical geometry and generic body proportions, not a measurement of this specific bike or you - sit on it before you buy.

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Rider Reviews

Total comments: 1
64x64

MotorcycleDB Review

The 2021 Kawasaki KLX 140R F is a versatile and fun off-road motorcycle that is perfect for riders of all skill levels. With its 144cc air-cooled, single-cylinder engine and five-speed transmission, this bike provides smooth and predictable power delivery, making it a great choice for beginners. The electric start and lightweight design make it easy to handle, while the adjustable suspension allows for a smooth ride over rough terrain. Whether you're hitting the trails or cruising through the woods, the KLX 140R F offers a comfortable and enjoyable riding experience. Overall, the 2021 Kawasaki KLX 140R F is a fantastic option for anyone looking for a reliable and user-friendly off-road motorcycle. Its combination of power, agility, and comfort make it a great choice for riders who want to explore the great outdoors and take on new challenges. With its durable construction and high-quality components, this bike is built to last and will provide hours of fun for riders of all ages. Whether you're a beginner or a seasoned off-road enthusiast, the KLX 140R F is sure to impress with its performance and handling.
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