Kawasaki KFX 400 Specs and Review 2022

Kawasaki KFX 400: One of Kawasaki’s less-known machines that is the KFX 400, was among the very first four-wheelers to revolutionize the ATV industry with the introduction of four-stroke motors. 

In the eyes of many, this set the stage for the modern-day sports quads, which take the racing world by storm.

Kawasaki KFX 400

It is the Kawasaki KFX400 can be described as a quick sport quad created by the collaboration between Kawasaki along Suzuki at the time of 2003. 

It was a version from the QuadSport 400 model, this racer featured the engine of a 3-stroke, with 85-mph top speed, a great brake system, an electric start system, as well an attractive design.

Its predecessor, the KFX 400 may have taken the backseat in the past. But when you consider its contributions to the 450-cc speed monsters, it definitely has a place in the front. Find out how to ride this car.

Kawasaki KFX 400

This is the Ultimate Do-It-All Machine

Prior to the introduction of 450-cc thoroughbred racers, 4x4s of 400 class such as those of the Kawasaki KFX dominated the race riding scene. 

There’s no reason to wonder why its sporty design with unmatched agility and its extremely long-lasting motor placed it at the top of race vehicles.

However, with the recent developments which have made 450-class quads the dominant model in this class, The KFX400 has fallen into second place and has defaulted to an elusive trail tamer.

Although many view this as a type of regression, this is one of the biggest advantages for the 4×4. It’s not often that four-wheelers boast themself of being excellent hybrid vehicles.

With the 400cc motor, owners can enjoy the thrill of riding for hours on the trails and the thrill of beating your pal or a professional competitor in the half-mile drag race.

The best part is that rarely do quads enjoy the acclaim of beating the Yamaha YFZ450R at the national MX championship it’s only it is the Suzuki QuadSport 400 replica does.

Models

There were four models made in the series between 2003 and 2006 before the KFX 400 was discontinued. 

The initial version of the 4×4 was built on the Suzuki DRZ400 dirt bike. It came with smaller carbs, a less tinned-down cam, and a new CDI with a softer curve and a lower rev limit. 

Although this configuration gave riders an extremely efficient power delivery, however, it didn’t quite make the most of the quad’s potential.

As of 2005, Kawasaki introduced cams and carburetors adjustments to the four-wheeler which resulted in a significant difference between day and night in the overall power. 

The changes bolstered the KFX 400’s position within the ATV landscape as a top-performing machine that can be used on dirt roads, trails, and sandy banks.

Kawasaki KFX 400 Specifications and Specifications Engine

The 400-class machine comes to life with a 36-mm Mikuni carburetor. It was later upgraded to a 37-mm CV style carb equipped with TPS to improve throttle response.

This upgrade in the carburetor was combined with a higher lift intake as well as intake cams to the Kawasaki KFX 400.

It is which allowed this DOHC engine to get more airflow and enhance its mid-to-top-end performance.

Engine Type 4-Stroke DOHC
Cylinder Arrangement Single cylinder
Carburetion System Carburetor, Mikuni BSR36 SS x 1
Engine Cooling Liquid cooling
Bore x Stroke Ratio 90 x 62.6 mm (3.543 x 2.465 in)
Compression Ratio 11.3:1
Starting System Electric
Displacement 398 cm³ / 24.3 in³
Maximum Power 28-32 hp/28.4-32.4 PS (20.9-23.9 kW, estimated)
Top Speed 65-85 mph (104.6-136.8 km/h) – owners’ claim
Air Filtration Polyurethane foam element
Lubrication Dry sump
Engine Oil & Quantity 2.1 US quarts w/ filter
2.2 US quarts w/out filter
2.3 US quarts at disassembly
SAE 10W-40 w/ API grade of SJ meeting JASO T903 MA
Other options: SAE 5W-30, 10W-30, 10W-50, 15W-40, 15W-50, 20W-50

maintenance: Like other sports ATVs it’s not recommended to use a wire in order to cleanse the passageways or jets on this model, since Kawasaki KFX 400 parts may get damaged by the process. 

Instead, opt for the dip-type cleaning solution along with spray-type cleaners to make sure that all components are free of clogs.

Because it’s not fuel-injected, it is possible to be required to adjust your jetting every 3300 feet in elevation to ensure maximum performance.

Drivetrain

With its chain-drive system and counterbalancer for vibration reduction, The KFX400 offers the perfect balance of handling, power, and suspension.

If the car were to have one flaw that was minor that could be the acceleration. The stock gearing contributes to the vehicle’s top speed, but it doesn’t give it the fastest 0-60-second time rating.

Apart from that, the machine is an absolute pleasure to ride. You can begin it in any gear by having the clutch pulled up. The choke is accessible on the left side of the bar.

Clutch Wet, multi-plate type
Transmission Type 5-forward and 1-reverse
Gearshift Pattern 1 down 4 up, foot-operated (forward); foot/hand-operated (reverse)
Drive System Chain drive, RK 520KZO 96 links
Primary Ratio 2.960 (74/25)
Final Drive Ratio 2.857 (40/14)
Transmission Gear Ratio Low – 2.538 (33/13)
2nd – 1.666 (30/18)
3rd – 1.238 (26/21)
4th – 1.000 (23/23)
Top – 0.846 (22/26)
Reverse – 2.153 (28/13)

Ignition

Its ignition button is located on the central pod The fuses and battery are located beneath the seat. 

If you’re in need of swapping the batteries in your stock then it is recommended to use the Yuasa YUAM329BS Batteries (view at Amazon) and any AGM, lithium, or gel version would be the ideal alternative.

Make sure you avoid overcharging because it can produce hydrogen, which can ignite when it comes into contact with sparks or a short circuit. 

Be sure to never replace your battery with a maintenance-free design with a regular one.

ignition Electronic CDI (Capacitor Discharge Ignition)
Ignition Timing 10° BTDC @ 1,500 RPM
Spark Plug, Gap NGK CR7E, DENSO U22ESR-N, gap (0.7-0.8 mm, 0.028-0.031 in)
Alternator Type Triple-phase A.C. generator
Rated Output 65V (AC) @ 5,000 RPM (no-load voltage)
Fuse 20 Amp
Battery 12V, 28.8 kC (8 Ah)/10 Hr, YTX9-BS formats
Battery Dimensions (L x W x H) 150 x 87 x 105 mm (6 x 3.44 x 4.19 in)

Brakes and Tires

The wheel-and-tire combination of the 4×4 is a fantastic brake system. Its stopping power is progressive and doesn’t require the death-locking of the brake levers in order to function. 

Furthermore, the extra grip of the factory-installed rubber helps in keeping the four-wheeler set on track.

Stock tires work great on typical off-road terrain. However, you might want to switch for ITP’s Holeshot XC Sport ATV tires (view at Amazon) for those who are looking to race in the desert and enjoy desert riding.

Front Tire, off-road/road air pressure Tubeless Dunlop AT22 x 7-10, 27.58 kPa (0.28 kgf/cm2, 4 psi)
Rear Tire, off-road/road air pressure Tubeless Dunlop AT20 x 10-9, 34.57 kPa (0.35 kg/cm2, 5 psi)
Front Brake Type Dual hydraulic discs w/ twin-piston calipers
Rear Brake Type Disc brake

Suspension

Suspension

The KFX 400 is able to handle high-speed acceleration as well as bump absorption effortlessly, and without the need to transfer hits onto handlebars. 

Its turning speed is quick and precise while traversing trails that are wooded is easy.

 However, more intense riding and hard, dry packs reveal the vehicle’s weaknesses and body roll tendencies.

Frame Type High-tensile tubular steel alloy
Caster, Trail 8.5°, 36 mm (1.42 in)
Steering Angle 41°
Turning Radius 3.1 m (10.2 ft)
Front Suspension Type, Travel Independent, double-wishbone, coil spring, oil damped (adjustable fork preload), 215 mm (8.5 in)
Rear Suspension Type, Travel Aluminum swingarm-type, coil spring, oil damped (preload, rebound, and compression damping adjustable), 230 mm (9.1 in)

However, the advantages that the suspension has (piggyback to shocks as well as frame strength for later-year versions) surpass its disadvantages. 

It isn’t an easy feat even after jumping several times, making it among the top on the market.

Dimensions

Since its beginning it has been since its inception, the KFX 400 has always been the lightweight vehicle in the 400cc category.

To keep that status it was required to balance its suspension upgrade and a stronger sub-frame by adding an entirely brand new cover made of magnesium for its valves, the clutch, and ignition, an aluminum front bumper, the rear grab bar, as well as shift levers made of aluminum.

Length 1,830 mm (72 in)
Width 1,165 mm (45.9 in)
Height 1,160 mm (45.7 in)
Seat Height (Unloaded) 810 mm (31.9 in)
Ground Clearance 265 mm (10.4 in)
Wheelbase 1,245 mm (49 in)
Track (F/R) 935 mm (36.8 in) / 910 mm (35.8 in)
Dry Weight 169 Kg (373 lbs)
Vehicle Load Capacity Limit 110 Kg (243 lbs)

Exterior

For a sports quad, the machine surprisingly lacked instrumentation. It came standard with 12V 3W neutral, reverse, and coolant temp warning lights but did not have an analog speedometer/odometer.

Footpegs atop serrated footrests provide the needed support for long trail rides. Plus, the seating position on the quad accommodates both average height and taller riders.

Dual 30-watt headlights, a 21-watt brake light, and a 5-watt taillight provide the quad superior light distribution. 

Body panel color options – Lime Green, Metallic Marble Red, Blazing Orange – add a dash of flair to the machine’s racy aesthetics.

Kawasaki KFX 400 Pricing

The below table shows the list price of all Kawasaki KSF400 models released from 2003 to 2006:

Year – Trim – Model Number List Price Retail/Trade-In Values
2003 Kawasaki KFX 400 KSF400A1 $5,699 $1,625 – $2,560
2004 Kawasaki KFX 400 KSF400A2 $5,699 $1,755 – $2,890
2005 Kawasaki KFX 400 KSF400A3 $5,699 $1,890 – $3,110
2006 Kawasaki KFX 400 KSF400A6F $5,699 $2,025 – $3,305

Similar to retail prices auctions range between $530 and $3,025. Resales are available online that include KFX models from 2003 and 2004. This is logical since the models prior to 2005 had frame problems.

On Craigslist The range on Craigslist is slightly more expensive – with one of the most costly secondhand models that are priced at $4000. 

Buyers might be somewhat disconcerting that there’s any information available on websites of trader sellers regarding the hours/miles traveled, conditions of operation, and any prior issues the quad might have.

It is a good bet when you find an unloved thumper in good condition with an extensive list of specifications and all the modifications completed in near-mint condition.

The Unknown Racer

The Underrated Racer

Many riders don’t have heard of (or recall) or remember the Kawasaki-Suzuki Alliance. 

The brief fusion of two auto giants was the catalyst for the development of Suzuki’s LTZ400 QuadSport and Team Green’s KFX 400.

Many people are familiar with Doug Gust riding the 400-class QuadSport and winning the national championship in motocross in 2004, very few are aware it is the Kawasaki KFX 400 is a replica of the race-winning four-wheeler. 

In addition, the KFX is built to replicate the official MX champion, but is not recognized for its race-worthy characteristics is a reason why it’s a bit undervalued.

Consumer and magazine reviews of the KFX400 have the same impression. A few owners confess to thinking that there was nothing to be said about the device, only to discover that the sturdy quad has plenty of power and can perform better than the more powerful Honda TRX400EX.

However, this might not be the case since the majority of KFX 400s that are available are secondhand and the working condition is heavily influenced by the previous owner’s maintenance and maintenance of their quad.

However, for a properly maintained unit, it is only necessary to have the jet kit, brand-new batteries and air filters wheel spacers, higher (and larger) tires, and a smaller toothed wheel that makes it suitable for muddy or hard terrain.

Kawasaki KFX 400: Pros and Cons

Fans of the sport would agree with this Kawasaki KFX 400 is as close to being a perfect trail bike as you could. Naturally, it has plenty of room to improve.

Yet, it’s definitely one of the most efficient four-wheelers that combines sport and hybrid technology. Team Green has ever released on the market. Let’s take a look at the highlights as well as the highlights from this renowned four-wheeler

Pros:

  • It’s the Kawasaki KFX 400 isn’t the best model in its field and is sandwiched between the high-performance and sports categories.
  • Despite the quick and precise turns even with a quick and precise turn, the 4×4 can be slightly tippy when it is pushed too far in the woods or in any terrain of the same difficulty.
  • Brakes are fantastic but don’t make the quad the same level of performance as its 450 class equivalents.
  • It’s a solid vehicle but it isn’t immune to crashing hard, particularly when you’re not able to complete triples or tackle an oversized tabletop of 65 feet.

Cons:

  • KFX 400 KFX 400 is a tried-and-tested combination machine for trail riding geared towards the aggro rider who often tests the quad’s power at its highest on dirt tracks and MX.
  • Stock shocks are as smooth as the aftermarket suspensions, making more comfortable rides in the beginning.
  • The dry-sump design reduces the overall height of the engine and contributes to the quad’s increased stability as well as higher ground clearance.
  • The power distribution of the vehicle became efficient with the addition of post-2004 upgrades, making the KFX400’s already exceptional torque curve
  • The front wheels can be lifted to clear obstacles is simple and hassle-free due to their fast power and shorter wheelbase.
  • Its high-revving DOHC engine makes traversing large space in a small period of time not just enjoyable but also feasible.
  • With the proper modifications If you make the right adjustments, the KFX400 can help you win national championships, as well as bragging rights while racing with your fellow competitors.

About Kawasaki

In 1878, the company was founded. founded in 1878, Kawasaki Heavy Industries, Ltd. began as an agent for parts to ship companies to become an eminent company within the ATV landscape.

The manufacturer of Kawasaki KFX400 is renowned for making world-class motorsports vehicles and a huge amount of production for transport, hydraulic machinery off-road vehicles, motorcycles side-x-sides personal watercraft, energy, and aerospace systems.

Conclusion Review Kawasaki 400KFX review

Overall All in all, the Kawasaki KFX 400 delivers thrills and performance thanks to its powerful engine, race-style chassis, triple-disc brakes, and manual transmission.

At present, the reliability and mod-friendly character of the all-wheeler is enough to handle a variety of sports riding conditions.

It might not be the best for its class, since it is a hybrid model. It will certainly bang heads with the top in thoroughbred racing quads. 

With its impressive qualities, this unnoticed off-road legend is among the most enjoyable and laudable machines ever made.

Engine

Engine Type 4-Stroke DOHC
Cylinder Arrangement Single cylinder
Carburetion System Carburetor, Mikuni BSR36 SS x 1
Engine Cooling Liquid cooling
Bore x Stroke Ratio 90 x 62.6 mm (3.543 x 2.465 in)
Compression Ratio 11.3:1
Starting System Electric
Displacement 398 cm³ / 24.3 in³
Maximum Power 28-32 hp/28.4-32.4 PS (20.9-23.9 kW, estimated)
Top Speed 65-85 mph (104.6-136.8 km/h) – owners’ claim
Air Filtration Polyurethane foam element
Lubrication Dry sump

Drivetrain

Clutch Wet, multi-plate type
Transmission Type 5-forward and 1-reverse
Gearshift Pattern 1 down 4 up, foot-operated (forward); foot/hand-operated (reverse)
Drive System Chain drive, RK 520KZO 96 links
Primary Ratio 2.960 (74/25)
Final Drive Ratio 2.857 (40/14)

Ignition

Ignition Electronic CDI (Capacitor Discharge Ignition)
Ignition Timing 10° BTDC @ 1,500 RPM
Spark Plug, Gap NGK CR7E, DENSO U22ESR-N, gap (0.7-0.8 mm, 0.028-0.031 in)
Alternator Type Triple-phase A.C. generator
Rated Output 65V (AC) @ 5,000 RPM (no-load voltage)
Fuse 20 Amp
Battery 12V, 28.8 kC (8 Ah)/10 Hr, YTX9-BS formats
Battery Dimensions (L x W x H) 150 x 87 x 105 mm (6 x 3.44 x 4.19 in)

Tires & Brakes

Front Tire, off-road/road air pressure Tubeless Dunlop AT22 x 7-10, 27.58 kPa (0.28 kg/cm2, 4 psi)
Rear Tire, off-road/road air pressure Tubeless Dunlop AT20 x 10-9, 34.57 kPa (0.35 kg/cm2, 5 psi)
Front Brake Type Dual hydraulic discs w/ twin-piston calipers
Rear Brake Type Disc brake

Suspension

Frame Type High-tensile tubular steel alloy
Caster, Trail 8.5°, 36 mm (1.42 in)
Steering Angle 41°
Turning Radius 3.1 m (10.2 ft)

Dimensions

Length 1,830 mm (72 in)
Width 1,165 mm (45.9 in)
Height 1,160 mm (45.7 in)
Seat Height (Unloaded) 810 mm (31.9 in)
Ground Clearance 265 mm (10.4 in)
Wheelbase 1,245 mm (49 in)
Track (F/R) 935 mm (36.8 in) / 910 mm (35.8 in)
Dry Weight 169 Kg (373 lbs)
Vehicle Load Capacity Limit 110 Kg (243 lbs)

Where is the VIN number on a KFX 400?

Every Kawasaki model has a different VIN place. The exact location of the VINs for your specific model is outlined in your owner’s manual, which is located near the top of the manual. They will also be on your registration papers. The VIN is printed on the steering head beneath that handlebar.

How much gas does a KFX 400 hold?

The 4.0G tank can hold 4.0 gallons (15.1 Liters) of fuel for trips off-road or longer journeys.

Does KFX 450r have reverse?

The KFX450R is the only model in its class that has a reverse drive. The light reverse gear could be a great feature if you are caught stuck in a first-turn tangle and the dirt of an event in cross country.

How do you tell what year my KFX 400 is?

How to Determine Year by the VIN on a Kawasaki

  1. Find your VIN Number on either the rear of the steering head or in the Safety Certification Label, which is typically close to or on the head of the steer.
  2. Keep counting the numbers until you get to the 10th. This is the year’s designation.

What model Kawasaki do I have?

The model number of the Kawasaki engine is found on a white label that has black text that is affixed to the exterior of the machine.

How do I find out what year my Kawasaki Mule is?

Find the VIN located in the head of the steer just below the handlebars. Note the VIN on an article of paper. Find the 10th character, which is the model year. Contact Kawasaki customer support at (949) 5688-460.

How much horsepower does a Kawasaki KFX450R?

High-acceleration cams that are symmetrical have the highest intake efficiency. The compression ratio for KFX450R is 12:1. KFX450R of 12:1. The engine needs an octane minimum of 91 for fuel. It produces 43 horsepower in addition to 31.1 tons of torque.

How do I identify my Kawasaki motorcycle engine?

Kawasaki Engine model and serial numbers are on a tag attached at the rear, on the engine’s housing. Check out the image below for a reference. The CODE number that is above the barcode is composed of the model number and the number of the spec. The first number is the model number, while the second number is the specification number.

How do you read a VIN number on a Kawasaki?

Kawasaki VIN code comprises 17 characters, and each letter has a meaning. For example, Kawasaki VIN codes begin by using the letters JK. J is for Japan (the nation that manufactures the bike), and K is for Kawasaki, which represents the manufacturer of the cycle.

What engine is in a Kawasaki Mule?

The engine is a fluid-cooled, 454cc twin-cylinder engine that is mounted on an open-cab utility vehicle with independent rear and front suspensions and a set of four all-terrain tires that have the rear differential lock feature. The MULE 1000 utility vehicle became an instant success.

Kawasaki KFX 400 FAQ

1. What years did Kawasaki make the KFX 400?

The suspensions are race-ready and can withstand the most brutal of conditions and still make the experience pleasant with regard to both strength and the rider’s comfort. Because of its updated suspension and suspensions, the KFX400 weighs only 169 kilograms (373 pounds) is very easy to control, and offers precision steering and firm, responsive responses.

2. How fast does Kawasaki KFX 90 go?

The fully automatic transmission features an encapsulated collar that limits speed it doesn’t limit acceleration, but it does limit the maximum speed up to 15 miles per hour.

3. How fast is a Suzuki LTR 450?

Its Suzuki LTR 450 top speed in its stock configuration increased from 75 to 78 mph during its 3rd season of operation, beating its predecessor, the YFZ450 by 3 miles. The front sprocket is put just one (1) teet further ahead, and including the Yoshimura Cherry Bomb chip and open filter box lid increases the speed rating up to 90 mph.

4. What replaced the Honda 400EX?

Honda changed with the 400EX in 2009 by the TRX400X.

5. How fast does Kawasaki KFX 90 go?

The fully automatic transmission features the speed-limiting collar built into it, which doesn’t limit acceleration but regulates the top speed up to 15 miles per hour.

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