• 2017 - 2018 Kawasaki KX 250F

    Kawasaki KX 250F The Japanese Green Team’s single-most dominant motocross bike of the last decade
  • Features slimmer shrouds as a result of revised radiators
  • ERGO-FIT adjustable handlebars and foot pegs
  • Flat fuel tank and the seat with reinforced ribs
  • 249cc liquid-cooled, 4-stroke, single cylinder motor provides 45 hp and 20 lb-ft of peak torque
  • High-performance bridged-box bottom piston dual-injector fuel injection system
  • Three engine maps (standard, hard, soft)
  • Titanium valves, new exhaust camshafts, sprockets, slimmer cam chain
  • Lighter aluminum perimeter with a new front downtube
  • Showa 48mm Separate Function Front Forks
  • Spoked 21″ and 19″ wheels sports Dunlop MX3s stubbed tires.
  • Comes equipped with Launch Control
  • Price: $ 7,749
  • Uni-Trak rear suspension with Showa shock
  • Adjustable handlebar mounts provide a choice of 4-positions

The Japanese Green Team’s single-most dominant motocross bike of the last decade

  • 2017 - 2018 Kawasaki KX 250F
  • Year:
    2017- 2018
  • Make:
  • Model:
  • Transmission:
    5
  • Horsepower @ RPM:
    45
  • Torque @ RPM:
    20
  • Displacement:
    249 cc
  • Price:
    7749
  • Price:
  • Overall:
    8/10
It is hands down is the single-most dominant motocross bike of the last decade. But for some time now, the Blue Crew has grabbed some of the limelight.

STYLING

2017 - 2018 Kawasaki KX 250F
- image 787498
Features slimmer shrouds
as a result of revised radiators

Let’s face it, nobody buys a motocross motorbike for the way it looks or for the way it is shaped and contoured. But, not many people realize that these design elements and minimalistic bodywork keep the motorcycle at the top of its game.

The 2017 onwards model features slimmer shrouds as a result of revised radiators and their new orientation. You get a flatter everything including the fuel tank and the seat with reinforced ribs. This combination of the new tank and seat aid in a more seamless design, which also makes it easy for riders to move around on top of the bike. And of course, you get a bash plate. Overall, the look of the bike is similar to the elder brother, the 450F.

2017 - 2018 Kawasaki KX 250F
- image 787499
Flat fuel tank and the seat with reinforced ribs

Making the motorcycle even more compact is the aggressive new bodywork that features front and rear fenders, number plate and fork guards all falling in line together. Also creating a distinctive Kawasaki identity are black excel rims, black fork guards, and green highlights.

The 2017 onwards model features slimmer shrouds as a result of revised radiators and their new orientation. You get a flatter everything including the fuel tank and the seat with reinforced ribs.

Overall Dimension

Make Model Kawasaki KX250F Yamaha YZ250F KTM 250 SX-F
Length 85.5 in 85.2 in n / a
Width 32.5 in 32.5 in n / a
Height 50 in 50.4 in n / a
Wheelbase 58.2 in 58.1 in n / a
Seat height 37.2 in 38 in n / a
Wet weight 230.3 lb 23 lb n / a
Fuel Tank 1.6 gal 2 gal n / a

POWERTRAIN

2017 - 2018 Kawasaki KX 250F
- image 787503
249cc liquid-cooled, 4-stroke, single cylinder motor
provides 45 hp and 20 lb-ft of peak torque

For the 2018 update, the Green team have given the 250F new redesigned engine with offset cylinder layout, for more efficient power and lighter piston designed by the company’s racing pedigree.

The power mill is tuned to suit the rider’s race experiences and boasts of a 249cc liquid-cooled, 4-stroke, single cylinder motor. It has a wide power band that focuses on high-rpm performance and is made to even extend into the over-rev range. A 5-speed, return shift transmission takes power to the rear via a chain drive. The motor provides 45 hp and 20 lb-ft of peak torque. The motorcycle gets new exhaust header with integrated resonator maximizing throttle response.

2017 - 2018 Kawasaki KX 250F
- image 787492
Three engine maps (standard, hard, soft)

Inside this power mill is where all the wizardry takes place. Taking cues from their racing departments, Kawasaki has made use of race-inspired tuning and parts like the high-performance bridged-box bottom piston to optimize combustion efficiency and help reduce friction. The cylinder has a new 7-degrees more forward offset that results in down draft-style intake routing which helps in having a more direct line to the combustion chamber. This eventually results in a stronger low end as well as an increase in maximum peak power.

Also, new innovations in fuel injection have led to a new imparted dual-injector fuel injection system that makes use on one injector facing downwards of the throttle valve and a second injector facing upwards close to the air box. This ensures smooth, instant response featuring a finer atomization with four more spraying holes in addition to the existing four in the injector itself.

2017 - 2018 Kawasaki KX 250F
- image 787509
Titanium valves, new exhaust camshafts, sprockets, slimmer cam chain

In an effort of the lightweight race, the pistons weigh 6 grams lighter and have a Molybdenum coating to reduce mechanical loss and reduce wear. Titanium valves, new exhaust camshafts, sprockets, slimmer cam chain, lighter 43mm throttle body and a lighter flywheel makes this a quick revving powerhouse.

The lightweight ECU provides a wide variety of tuning from the factory, and the rider can access three engine maps (standard, hard, soft). One can also opt for KX FI Calibration Kit (Handheld) that makes it a breeze to map your preferred settings on the go.

2017 - 2018 Kawasaki KX 250F
- image 787507
High-performance bridged-box bottom piston
dual-injector fuel injection system
A 5-speed, return shift transmission takes the power to the rear via a chain drive. The motor provides 45 bhp and 20 lb-ft of peak torque.

Engine Specification

Make Model Kawasaki KX250F Yamaha YZ250F KTM 250 SX-F
Capacity cc 249 250 249.9
Bore / Stroke mm 77 / 53.6 77 / 53.6 78 / 52.3
Output 45 hp n / a 45 hp
Torque 20 lb-ft n / a 20 lb-ft
Type 4-stroke, 1-cylinder, DOHC, water-cooled Single cylinder liquid-cooled DOHC 4-stroke; 4 titanium valves 1-cylinder, 4-stroke engine
Clutch type Wet- Multiplate Multi-plate wet Wet multi-disc clutch, hydraulically actuated
Transmission 5-speed, return shift 5-speed 5-speed

RIDE AND HANDLING

2017 - 2018 Kawasaki KX 250F
- image 787494
Spoked 21″ and 19″ wheels
sports Dunlop MX3s stubbed tires.

Talking about the business aspects of these machines, the updated model sees the return of the ERGO-FIT adjustable handlebars and foot pegs. The adjustable handlebar mounts provide a choice of 4-positions (35mm range of adjustment) enabling the rider to set-up their ideal riding position. Factory-style Renthal handlebar and handlebar pads come as standard. Two-position adjustable foot pegs help reduce knee angle when seated.

A new 3mm narrower main beams and newly redesigned, a lighter aluminum perimeter with a new front downtube has been optimized to obtain improved front-end feel. All of these contribute to razor-sharp cornering and superior handling while a flatter seat and new bodywork allow easier rider movement.

2017 - 2018 Kawasaki KX 250F
- image 787511
Lighter aluminum perimeter
with a new front downtube

Suspension duties up front is taken by Showa 48mm Separate Function Front Forks (SFF Type 2) with both damping and rebound adjustments that contribute to greater stability over braking and through corners. This has an improved fork action that provides sharp cornering and smooth, predictable front-end action through bumps and excellent stability when on landing jumps.

Out back the Uni-Trak rear suspension with Showa shock takes care of the damping with new linkage ratios and valve settings for an improved ride and feedback. The shocks make use of lighter springs and lower pitching effect, courtesy its lower rate. All this is mounted below the swingarm to maximize wheel travel and can be adjusted for a wide range of options. Self-lubricating alumite coating on the inner shock body improves wear resistance and shock action.

2017 - 2018 Kawasaki KX 250F
- image 787510
Showa 48mm Separate Function Front Forks

Given the racing experience and pedigree of the company, it is no surprise that this KX dons the 270mm petal-style disc brakes in the front and the rear with dual and single piston calipers. Spoked 21″ and 19″ wheels sports Dunlop MX3s stubbed tires.

To get you off the starting line/gate, Kawasaki has equipped the KX with Launch Control to maximize traction and acceleration. A tech reprised from the Kawasaki factory race team. It can be activated with just a push button which keeps assisting all the way into the first and second gearing and disengages itself as soon as you shift into the third gear.

2017 - 2018 Kawasaki KX 250F
- image 787495
Comes equipped with Launch Control
Kawasaki has equipped the KX with Launch Control to maximize traction and acceleration. A tech reprised from the Kawasaki factory race team.

Chassis Specifications

Make Model Kawasaki KX250F Yamaha YZ250F KTM 250 SX-F
Frame Aluminum perimeter n / a 25CrMo4 steel central-tube frame
Suspension / Front 48mm inverted Showa SFF telescopic fork with 40-way spring preload adjustability and 22-position compression and 20-position rebound damping adjustability WP-USD, AER 48, 48 mm WP-USD, AER 48, 48 mm
Suspension / Rear Uni-Trak® linkage system and Showa shock with 19-position low-speed and 4-turns high-speed compression damping, 22-position rebound damping, fully adjustable spring preload WP shock absorber with linkage WP shock absorber with linkage
Brakes / Front Single semi-floating 270mm Braking® petal disc with dual-piston caliper 260 mm petal-type disc 260 mm petal-type disc
Brakes / Rear Single 240mm Braking® petal disc with single-piston caliper 220 mm disc 220 mm disc
Tires / Front 80/100-21 n / a n / a
Tires / Rear 100/90-19 n / a n / a

PRICE

2017 - 2018 Kawasaki KX 250F
- image 787497
Price: $ 7,749

The 2018 edition of the Kawasaki KX 250F comes with a price tag of $ 7,749. Destination Charges $370. The only available color is Lime Green. Accessories can also be purchased to level up the motorcycle’s capabilities. They include lever assemblies, KX FI Calibration Kit, and green racing chain.

Make Model Kawasaki KX250F Yamaha YZ250F KTM 250 SX-F
Price $ 7,749 $ 7,699 $ 8,699

COMPETITION

Yamaha YZ250F

2015 Yamaha YZ250F Exterior
- image 562052

Reliable to the core, the Yamaha YZ250F is a great choice for those who are looking for a tough and unstoppable dirt bike to satisfy their thirst for adventure. The motorcycle is propelled by a 249 cc, liquid-cooled DOHC 4-stroke; 4 titanium valves, EFI engine which is mated on a constant-mesh 5-speed transmission with multi-plate wet clutch.

The motorcycle’s speed is kept in check by hydraulic single disc brakes that measure 250mm up front and at the 245mm at the rear. As far as suspensions are concerned, the Yamaha YZ250F is equipped with front KYB air-oil separated forks and a rear KYB fully adjustable single shock.

The bike rides on 80/100-21 Bridgestone M404-A front and rear 100/90-19 Bridgestone M403 tires which help it deal great with any type of terrain. The Yamaha YZ250F is offered with a base price of $7,590.

KTM 250 SX-F

2015 KTM 250 SX-F Exterior
- image 574414

The 250 SX-F has been an established force in the MX2 World Championship for years now. In addition to the world title, it also won the prestigious AMA Supercross Lite Championship.

The motor comes with a push-button starter, and the 4 valve, 4 stroke, DOHC 249 cc motor churns a peak power that is claimed to be 45 hp and 20 lb-ft. Power is transmitted through a semi-close-ratio six-speed gearbox, and redlines to an astonishing 14,000 rpm. The fuel injector is a Keihin system with a 44mm throttle body.

All SX models are equipped with the extremely sturdy, tapered Renthal Fatbar 827 handlebar. High-tech brakes from Brembo have always been standard equipment on KTM offroad bikes. The fully adjustable upside-down fork from WP Suspension has been perfectly tuned to the new rear wheel damping system.

VERDICT

2017 - 2018 Kawasaki KX 250F
- image 787505
Uni-Trak rear suspension
with Showa shock

To regain the title of being the single-most dominant motocross bike, the Japanese green team have upped the motor specs to get an improved power and torque throughout the rev range. —The 2018 Kawasaki KX250F was found to have significantly faster lap times on the Kawasaki test track compared to the 2017 model.

The changes got into the motorcycle were a move in the right direction. A quick revving motor with traction control will steal the limelight out of any off-road motocross spec bike. The lighter and stiffer chassis is here to stay, and it makes the motorcycle easier to ride and maneuver. And when it comes to competing against its cohorts, we have a strong reason to believe that the Green Team will bag top honors.

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