2021 Kawasaki KX250X Guide

2021 Kawasaki KX250X

2021 Kawasaki KX250X 2021 Kawasaki KX250X 2021 Kawasaki KX250X 2021 Kawasaki KX250X


Introducing the new 2021 Kawasaki KX250X…

With a rich history in off-road racing, Kawasaki adds the new KX250X to its off-road line-up. The new crosscountry racer retains all of the championship-winning performance and factory-style features of the KX250 motocross racer but adds X-specific engine tuning and suspension settings, 21/18-inch wheels fitted with enduro-type tires, and convenient standard features like a side stand and skid plate.

The all-new 2021 KX250X has been designed for the rising stars in the XC2 250 Pro or Pro 2 Class and provides riders with a off-road competition motorcycle. Built from the legendary motocross winning pedigree of the KX250 motorcycle and tuned to best suit off-road race-experienced riders, the 249cc liquid-cooled, four-stroke engine, slim aluminum perimeter frame, top of the line KYB suspension components, hydraulic clutch and electric start are the ultimate combination of a championship winning package.

The KX250X is built with race-winning components to help Kawasaki riders get to the top step of the podium in all off-road and cross-country racing enviornments. From the showroom to the racetrack, the performance of Kawasaki’s KX family of motorcycles is proof of its engineering pedigree.


2021 Kawasaki KX250X Totalmotorcycle.com Key Features
  • Powerful, high-revving 249cc liquid-cooled, 4-stroke single
  • Finger-follower valve actuation
  • Dual injectors
  • Coned disc-spring hydraulic clutch
  • Electric start
  • Launch Control Mode
  • KX-style setting-adjustable motocross ECU
  • Fully adjustable suspension and high-performance brakes
  • F21”/R18” wheels with enduro-type tires
  • ERGO-FIT adjustable handlebar and footpeg positions
  • Factory-style Renthal Fatbar
  • Skid plate and side stand



2021 Kawasaki KX250X Totalmotorcycle.com Features and Benefits


The four-stroke, single cylinder, DOHC, water-cooled 249cc lightweight engine package utilizes input derived directly from the factory race team, with optimized engine mapping and settings for off-road racing. The powerful KX250X 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 KX250X 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®/Pro Circuit/Kawasaki race team’s 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 KX250X  has shorter gearing than its counterpart, the KX250, with a final gear ratio of 51/13. The transmission is paired with a coned disk-spring hydraulic clutch that is designed to provide a consistent feeling through minimal change in play as the clutch heats up during heavy use. The coned disc-spring contributes to a light clutch actuation and a wide clutch engagement range, which facilitates increased control.



The industry-leading slim aluminum perimeter frame is all-new for 2021 and 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 frame’s 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’s raw look. 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 KYB 48 mm coil spring front forks 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, but with optimized spring rates and damping settings for off-road riding. The forks enable the use of large damping pistons for smooth action and firm damping. Kashima Coating on the fork tubes helps prevent wear and abrasion while optimizing performance.

In the rear, a new Uni-Trak® linkage system is designed to work in conjunction with the KYB 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 KYB rear shock features dual compression adjustability, allowing high-speed and low-speed damping to be tuned separately. Kashima Coating on the shock helps prevent wear and reduces friction for smoother suspension action.

An oversized 270 mm, petal-shaped front brake rotor from the renowned manufacturer, Braking, is fitted to perfectly complement the powerful engine of the KX250X. The rear is equipped with a 240 mm petal-shaped Braking® rotor that matches the large front disc. Both are gripped by Nissin master cylinder and caliper setups and feature cross counrty specific pads.



The KX250X is equipped with many specific cross-country components, such as the 21” front and 18” rear wheel combination paired with Dunlop GEOMAX AT81 tires, which were selected for optimal handling in off-road racing conditions. Other cross-country specific components include the durable plastic skid plate and side stand.



Kawasaki continues its umatched 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 KX250X is equipped with factory-style 1-1/8” aluminum Renthal® Fatbar® handlebar, as standard equipment. 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 2021 KX250X features aggressive styling along with in-mold graphics on the radiator shrouds that result in an ultra-smooth surface and factory-racer look needed to finish at the top of its class. The sleek bodywork has been molded to match the V-mounted radiators and narrow chassis design. Each piece of the bodywork has been designed to help facilitate the rider’s movement with long, smooth surfaces. The rims are coated with a tough, durable black alumite treatment. Adjusters on the fork and shock both feature a high-quality green alumite finish. A gold finish on the oil cap and the both plugs on the engine cover further contribute to KX factory-racer looks and styling.





2021 Kawasaki KX250X – Totalmotorcycle.com USA Specifications/Technical Details
US MSRP Price: $8399  USD
Canada MSRP Price: $9799 CDN
Europe/UK MSRP Price: £ See Dealer GBP (On The Road inc 20% Vat)

Engine Type 4-Stroke, Liquid Cooled, DOHC, 4-Valve, Single
Displacement 249cc
Bore & Stroke 78.0 x 52.2 mm
Compression Ratio 14.1:1
Fuel System DFI® w/Keihin 44mm Throttle Body & Dual Injectors
Ignition Digital DC CDI
Transmission 5-Speed
Rake/Trail 27.8°/4.8 in.
Front Wheel Travel 12.4 in.
Rear Wheel Travel 12.4 in.
Front Tire Size 80/100-21
Rear Tire Size 110/100-18
Front Suspension 48mm Inverted, Coilspring Fork with Adjustable Compression and
Rebound Damping
Rear Suspension Uni-Trak® w/ Adjustable Preload, Adjustable Dual-range (Low/High Speed)
Compression Damping, Adjustable Rebound Damping
Wheelbase 58.3 in.
Front Brake Type Semi-Floating 270mm Disc
Rear Brake Type 240mm Disc
Fuel Tank Capacity 1.64 gal.
Ground Clearance 13.0 in.
Seat Height 37.2 in.
Weight Without Fuel 230.2 lb.
Curb Weight= 240.2 lb.
Specifications subject to change without notice.
Ask about Kawasaki’s Team Green™ amateur rider support program.
(KP) = See Kaw-Pedia section for more details.
* = Changes from previous model year.
= = Includes all necessary materials and fluids to operate correctly, full tank of fuel (more than 90% of capacity) and tool kit (if supplied).



2021 Kawasaki KX250X – Totalmotorcycle.com  Canadian Specifications/Technical Details
Engine 249cc, liquid-cooled, 4-stroke, DOHC 4-valve single
Bore x Stroke 78.0 x 52.2 mm
Compression Ratio 14.1:1
Fuel System Fuel injection: ø44 mm x 1, with dual injectors
Ignition Digital DC-CDI
Starting Electric
Lubrication Forced lubrication, semi-dry sump
Transmission 5-speed, return
Clutch Wet multi-disc, manual
Final Drive Chain
Frame Perimeter, aluminum
Front Suspension / Wheel Travel ø48 mm inverted fork with adjustable compression and rebound damping / 314 mm (12.4 in)
Rear Suspension / Wheel Travel New Uni Trak with adjustable dual-range (high/low-speed) compression damping, adjustable rebound damping and adjustable preload / 316 mm (12.4 in)
Rake 27.8° / 123 mm
Steering Angle (L/R) 42° / 42°
Front Tire 80/100-21 51M
Rear Tire 110/100-18 64M
Front Brake Single semi-floating ø270 mm petal disc with dual-piston caliper
Rear Brake ø240 mm petal disc with single-piston caliper
Dimensions (L x W x H) 2,170 x 820 x 1,260 mm (85.4 x 32.3 x 49.6 in)
Wheelbase 1,480 mm (58.3 in)
Road Clearance 330 mm (13.0 in)
Seat Height 945 mm (37.2 in)
Curb Mass** 109.0 kg (240 lb)
Mass Without Fuel 104.4 kg (230 lb)
Fuel Capacity 6.2 litres





2021 Kawasaki KX250X – Totalmotorcycle.com European Specifications/Technical Details





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

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