Kawasaki 125 Dirt Bike KX Specs and Review 2022

Kawasaki 125 Dirt Bike XK: When it was first introduced at the time of its debut at the time of its launch, at the time of its launch, Kawasaki 125 Dirt Bike was considered to be a serious contender for class 125. 

The 1984 revision was the start of the XK(TM) lineup, which reestablished credibility and a great return to the Japanese manufacturer following the lowest sales figures in the 1970s and early 1980s. 

Kawasaki 125

A strong dirt bike that had lots of potential the XK 125 placed Kawasaki back in the spotlight for MX racing.

 Kawasaki 125 Dirt Bike was an off-road bike with a capacity of 124 ccs manufactured in the name of Kawasaki from 1974 until 2009. 

The seemingly simple machine was designed in an enduro-style and featured an entirely new design that set things moving for larger-displacement bikes, which eventually were able to win Baja championships.

Ingenuity has always been a significant selling factor for Kawasaki. It took more than a decade for Team Green to realize the same thing for XK 125. XK 125.

Fortunately, the situation wasn’t quite that bad and the bike’s massive overhaul in 1984 placed it in the hands of both consumers as well as enthusiasts for another 25 years.

Learn more, and find out this, and much more information about this model of Kawasaki XK 125 in this article.

Kawasaki 125 Dirt Bike

About the Kawasaki XK 125

It is the Kawasaki Dirt Bike 125 is a revival of the 1983 Quacker which is known for its powerful horsepower however it has been heavily criticized for its design flaws. 

When it was built the Japanese manufacturer was able to eliminate the bulky chassis, unforgiving forks, fragile metal, and uninspiring design of its predecessor.

They kept just two of its strengths the disc brake on its front as well as the massive motor. 

XK 125 was XK 125 was then redesigned in the wake of it as the Works Machine of Jeff Ward(retired Kawasaki motorsports champion as well as an IndyCar racing driver).

A Notch Higher

The key improvements of the Kawasaki 125 2Stroke are reflected in its motor, frame transmission, as well as overall reliability. 

The chassis was designed with a lower wheelbase as well as an angle of the head that is steeper which results in quicker steering input response and improved handling while climbing.

Larger tubing in crucial areas and an increased gusseting around the pivot of the swingarm made the new frameless heavy but more durable. 

Team Green engineers reinforced the crankcases and increased the mating area to address problems caused by air leaks.

Other changes included wider-toothed gears and new friction plates that have embedded grooves in the radial direction for this clutch as well as internal ports as well as a brand-new expansion chamber and ignition. 

The improvements made to the cooling system on the bike were especially noticeable.

In comparison to the version from previous years in 1984, the XK had a bigger single-sided radiator, as well as larger water passages, to address problems with overheating leading to the cooling capacity to be 29% improvement.

Due to these modifications, as a result, it was clear that the Kawasaki Dirt Bike 125 felt more like a 150-cc model and transformed from a bench warmer for MX into a beast. 

It pulled faster on the tracks and pulled with more power than similar displacement models. The new motor allowed the bike to be used by new riders, not only experts.

That One Handicap

Although KX125 XK 125 was considered best in terms of power output and position the suspension exuded improvements. 

However, the tweaks made to the suspension system of the bike did not provide enough. The slightly stiffer springs were not as stiff for riders who were intermediate to advanced.

Because of the huge jumps that result in crash landings as well as complaints about the harsh spikes that occurred in the mid-stroke area, it was the Kawasaki XK 125 was considered to be the most sluggish front-end performance of all 125 class bikes in 1984.

However, this isn’t to suggest that the suspension system was insufficient and was the only issue that lasted for a long time. 

Brakes on the front were vulnerable to leaks and were needed regular bleeding. Plastics also had an inclination to break, particularly for competitive wheelers and those with a lot of hard riding among other things.

Although it was not quite as good in these areas, However, it was Kawasaki 125 Dirt Bike was nevertheless a sturdy and sturdy machine. 

The setbacks it suffered were not significant enough to stop the bike’s rise in the role of “Ruler of the Roost.”

Kawasaki 125 Dirt Bike Specs & Features Engine

A liquid-cooled, single-cylinder power mill that features high-tech carbon-fiber valves that power the Kawasaki 125 Dirt Bike. 

It has a bore-stroke proportion of 54 54.5 x 54.5 millimeters (2.13 2 2.15 inches). The engine’s displacement is 124 cubic centimeters (7.6 cu inches) The compression ratio of the engine is 10.6:1 (low speed)/8.1:1 (high speeds). 

A Mikuni carburetor measuring 34mm and an R-slide with a flat bottom manages the air-fuel mixture. In later models, the carburetor sizes were increased to either the Keihin PWK36S or the Mikuni TMX38X.

The engine configuration mentioned above leads to Kawasaki’s 125 Dirt Bicycle top speed of 55- 60mph (88 – 95 kilometers/h), 26.5 Nm (2.7 kgf-m, 19.5 ft-lb) @ 2700 RPM maximum torque as well as 40.49 HP (29.6 kW) horsepower. 

Later-year models equipped with the 38mm Mikuni carb gave 75 miles per hour (120.7 kilometers/h), 41.04 hp (30.6 kW) at 11,500 RPM power and the maximum torque was 27 Nm (2.75 kgf-m, 19.92 ft-lb) @ 10,500 RPM.

Fuel & Lubrication

The tank’s capacity of 8.2 (2.2 US gal) (2.2 US gal) of unleaded gasoline, with the minimum rating of PON 87/RON91. With the KX125’s engine design, the bike provides a reasonable fuel efficiency at 60 miles per gallon (3.92 Liters per 100 kilometers). 

The manufacturer recommends fuel types with a minimum of 5percent MTBE (Methyl Tertiary Butyl Ether) and 10 percent ethanol or five percent Methanol. 

In the event that the engine is knocked or has a ping that occurs changing fuel, brands are recommended to avoid serious engine damage.

Furthermore, it needs 0.7 Liters (0.74 US quart) of K-Tech 2-stroke oil or equivalent. The ideal oil viscosity is SAE10W-40 with the minimum API SJ grade that meets JASO T903 MA MA1, MA1 standards. 

Depending on the temperature of the environment the recommended viscosity is SAE 10W-30, 10W-50 20W-40, or 20W-50. Always consult the manual before applying a different lubrication method to XK 125. XK 125. 

If you don’t, you could experience slow running or losing power at higher rates if the viscosity is too high.

Kawasaki 125


Manual (wide-ratio) 6-speed continuous mesh return mechanism (left-foot operated) and a wet multi-disc clutch assembly supply electricity to the wheel. 

An O-ring chain of 520 links (with 112 links plus a joint) is responsible for the wheel spin. 

The Kawasaki Dirt Bike’s wide-ratio transmission is the reason for its capacity to stay ahead of competitors on racetracks and create enormous power while revving at a lower speed that puts it in line with wheelers of 250cc. 

In the 1992 and 1993 models, both rear and front sprockets were changed between 13/51T and 12/49T (4.08) which further improved acceleration.

To help you, the standard gear ratios are as follows:

Primary Reduction Ratio 3.200 (64/20)
Final Reduction Ratio 3.923 (51/13)
Transmission Gear Ratio (1st) 2.384 (31/13)
Transmission Gear Ratio (2nd) 1.857 (26/14)
Transmission Gear Ratio (3rd) 1.529 (26/17)
Transmission Gear Ratio (4th) 1.294 (22/17)
Transmission Gear Ratio (5th) 1.125 (27/24)
Transmission Gear Ratio (6th) 1.000 (25/25)
Overall Drive Ratio 12.553 @ Top gear


This 125-cc Kawasaki XK has an electronic CDI (Capacitor Discharge Ignition) and a primary kick-start system that wakes it up. 

The car’s charging system includes a flywheel magneto that also powers electronic devices. The ignition speed is 13deg BTDC with 9 710 RPM (initial “F” mark).

All models are equipped with a 130-CCA 12-volt (6 Ah)/10 HR YTZ7 battery (view on Amazon) with dimensions of 110 x 70 x 105mm (4.44 x 2.74 and 4.12 inches, L W x). 

It requires the use of an NGK BR9EIX spark plug that has a 0.7 to 0.8 millimeter (0.028 to 0.031 inches) gap, and a tightening of the torque to 27 Nm (2.8 kg-m 20 lb-ft) (with the exception of the ’97 model which comes with the NGK BR9EVX plug. European models have either NGK R6918B-9 or NGK the BR9ECMVX plug.

Tires & Brake

The rear and front aluminum wheels have Dunlop(r) tires. It is possible to swap the front tires to Maxxis M7304D max cross desert It Tires (view at Amazon). 

Similar to rear tires, the front ones can be replaced with Dunlop Geomax MX33 tires (view the full list on Amazon) They are perfect for medium-to-soft terrain.

Recommended tire pressures are based on the track conditions. the recommended pressure is 80 kPa (0.8 kg/cm2 11 PSI) for sandy, muddy or slick terrains. 100 kPa (1.0 kg/cm2 14psi) for pebble-laden surfaces or hardpack. 

A proper amount of pressure can increase the tread’s area on the ground or prevent tire punctures and damage. 

Additionally, a 220-millimeter (8.7-inch) front disc equipped with dual-piston calipers as well as a 200-mm (7.9-inch) disc on the back offer stopping power, and complete the tire-wheel assembly of the XK 125.


The front suspension comprises the standard 43-millimeter Kayaba forks (other models come with shorter 36-mm cartridges). 

On the back it was the exact Uni-Trak(r) Linkage suspension rear that was used on the ’83 125cc bike and KLX 300s was utilized, however, it was slightly modified from the original design to provide less advancement.

Rear suspensions were joined with aluminum Kayaba shocks that have a brand new bladder design (as a contrast to the carbon system used by the Quacker).

Carbon system that is used in the Quacker) that resulted in better fade resistance, greater wheel travel, as well as smoother handling. 

The front forks as well as the rear shocks have a huge quantity of wheel movement. 300 millimeters (11.8 inches) and 300 millimeters (12.2 inches) and 310 mm (12.2 inches) respectively. 

They’re adjustable for air and compression. But, they did not have an adjuster for a rebound.

Kawasaki 125 Dirt Bike Specs


The dimension of the Kawasaki 125 Dirt Bike is 2,155 x 825 x 1200 millimeters (84.8 84.8 x 32.5 and 47.2 inches, L W and H). 

Machines that are made available in Europe are only slightly different in size from those found that are available in North America – at 85.2 inches x 33.1 and 49.8 inches. 

The ground clearance is 340 millimeters (13.4 inches) and the wheelbase is 1,455 millimeters (57.3 inches) + 2percent. The saddle is situated at an altitude between 930 and 940 millimeters (36.6 37-37 inches). Its dry weight ranges from 87 to 102 kg (192 pounds).


It comes with a tubular semi-double-cradle steel frame (with the 27.5deg angle of caster, 100-mm/3.9-inch trail, and 45deg of the steering angle). 

The standard Kawasaki 125 Dirt Bike components include grips, handlebars chain guards, fork and chain guards as well as rear and front fenders. 

Because the bike doesn’t come with a skid plate purchasing a Devol skid plate (view the item on Amazon) can help safeguard the vehicle’s underside.

In terms of design, Kawasaki adopted the polished style that was seen in the Jeff Ward Works Machine – all except the saddle that was replaced by an elegant blue that match the overall design of the bike. 

In addition to the color, the saddle was also reshaped to feature an updated tank design. This was a great addition to the slimmer tank-shroud combination that made sliding forward more intrusive and more comfortable. 

The front fender of the buzzard-beak was more rounded, and also had an alloy brace that prevented it from breaking when weighed down with dirt.

Kawasaki KX 125 Price

The retail price of XK 125 is $4,949 for post-2000 models. XK 125 ranges from $4,949 to $5,099 for models post-2000. 

However, sources for the MSRP of earlier XK models can be somewhat difficult to find. Nada Guides information shows average resales values for all models up to 2005, excluding the final three years of production for the 2-wheeler. 

Models prior to 1985 hold their value fairly well and are more than double their price at the time of their initial listing. However, later-year versions of the bike are for as little as $250.

Year – Trim – Model Number Retail/Trade-In Values
1974 – 1977 Kawasaki KX125/A3 $690 – $7,095
1978 Kawasaki KX125-A4 $1,110 – $8,725
1979 Kawasaki KX125-A5 $750 – $7,375
1980 Kawasaki KX125-A6 $750 – $4,645
1981 Kawasaki KX125-A7 $990 – $6,670
1982 -1984 Kawasaki KX125-B1/B2/C1 $750 – $4,645
1985 – 1991 Kawasaki KX125-D1/E1/E2/F1/G1/H1/H2 $750 – $3,990
1992 – 1993 Kawasaki KX125J1/J2 $250 – $1,830
1994 – 1998 Kawasaki KX125K1/K2/K3/K4/K5 $250 – $1,975
1999 – 2002 Kawasaki KX125L1/L2/L3/L4 $345 – $2,045
2003 Kawasaki KX125M1 $480 – $630
2004 Kawasaki KX125M2 $615 – $810
2005 Kawasaki KX125M3 $775 – $1,020

On the internet, the marketability of the 125cc bike appears to be eclipsed by the popularity of its predecessor, the Kawasaki KX250F. 

It is possible to find this previously owned classic in good shape by visiting well-known trading sites and directly contacting the private owner. 

You can expect second-hand prices to be in the same area as the one above. Anything beyond $4,000 would usually come with mods, lights, or performance-enhancing parts.

From Off-Road to Street-Legal

Although this Kawasaki the 125 Dirt Bike is definitely an off-road vehicle, many people are now buying the two-wheeler to transform it into an urban ride. 

This shouldn’t come as a surprise since enduro-style bikes are now a popular choice for both city and leisure driving. 

This article will show you how to transform your off-pavement bike into an everyday commuter.

DOT-Compliant Headlight

There are three things your headlight must have to ensure compliance.

  • Include a high beam and low beam functions (and preferably, actuated by an easily-to-reach switch)
  • Be visible, but not obscure drivers or traffic on the horizon.
  • Make sure that there is ample light distribution both night and day

You can select Halogen, HID, or LED light sources in your headlamps. Be aware that halogen lamps draw electricity from the electrical system of your bike more than LEDs do. 

In addition, you’ll require an electric charging system that can work alongside your battery. If you choose to use the halogen type, you should buy a new stator to assist in powering the lighting system that you install on your bike.

Whatever you decide to use I highly recommend making use of battery-powered lighting to avoid getting a dim light as they run low on RPMs.

Brake Light & Taillight

The taillight or brake light should have a connection to the battery and be illuminated for at least 20 minutes. 

The light should be bright enough to signal motorists that you’re slowing down or getting attention while riding at night. 

Only one brake light or taillight is required in some states. To ensure this, you must research the state/township regulations for brake and taillights.

If properly installed The taillight will turn on after both the brake pedal on the back as well as the front lever of the brake are in use. 

A banjo-bolt switch makes sure this occurs by using more pressure in the brake line. In addition, mechanical switch options are ideal for drum brakes. 

While you’re at it you can purchase an aftermarket bracket and fender combination for a more polished appearance after fitting the required lighting.

Rearview Mirror

Mirrors are a great fit with the rugged style on the dirt motorcycle. Although some places only require the use of a single mirror It’s logical to have two. 

If you are not a fan of stem mirrors and are unappealing, you can opt for bars-end mirrors with a low profile or wide-angle mirrors to enhance your appearance. 

They are lower profile than the majority of them but are still effective in making sure that blind spots are eliminated in both the front and back of the dirt bike.

Turn Signals

The installation of blinkers and flashers can be avoided in some states/areas when you are using hand signals. 

However, to be cautious opting for blinkers with auto-canceling features is more beneficial since it helps you concentrate on the road ahead when you make the turn. Be sure to follow the specific rules of your state for the installation of the front turn signal and back. 

Also, note the height and spacing that is recommended between turn signals when the installation.

DOT-Approved Tires

Making sure you equip the XK with tires that are DOT-certified is vital, as the rubber used on the bike is not suitable for use on roads. 

Tires that bear the DOT letters on their sidewalls however are stuffed with extra layers of rubber that are highway speed certified. Supermoto builds are an increasingly well-known method of transforming an off-road vehicle into an all-sports bike. 

As long as the sportbike tires are able to fit onto the rims of your bike, they could be substituted for standard rubber.

Horne two main conditions for installing a horn are the following:

  • It has to be heard from at minimum 200 feet away
  • It has to be electrical (some states allow non-electric horns to be inspected)

License Plate Bracket

Kits with an alternative fender, a holder for license plates, and a light are on sale on the internet. There are some options that do not come with the replacement fender. 

No matter if you put your license plate horizontally or vertically it is essential to make your plate visible. 

Installing a cheap LED strip on top of the license plate will make this feasible.

Other legal requirements for road use include reflectors, a muffler with a digital instrumentation complete, well-ventilated crankcases as well as other emission control devices. 

Installing a fan or altering gearing to street use might be necessary. It all depends on the overall condition is of the bike (if you own a second-hand wheeler) it could be necessary to perform some suspension or top-end work, as well as frame repair.

The most difficult thing about making your XK 125 legal on the road is obtaining the necessary paperwork or sign-off from your local motor vehicle department. 

For additional requirements that are specific to specific U.S. states, check out this post on the Honda XR650R.

About Kawasaki

Kawasaki Heavy Industries, Ltd. is the creator of Kawasaki 125 Dirt Bike. It is famous for its off-road motorcycles, off-road vehicles side x sides, and watercraft. 

The Japanese company is responsible for the creation of many of the more innovative and powerful vehicles in the marketplace. 

In addition, it is an acknowledged leader in the field of motorcycling.

This company was in and out of its way from the Enduro motorcycle scene over the past several years. 

However, with its latest offerings in the market riders can wait to see more exciting things to come from its range of products. 

Kawasaki’s goals are to continue to improve the energy and aerospace systems and hydraulic machinery, ATVs motorized vehicles, public transit, and personal watercraft.

Conclusion – Kawasaki 125 Dirt Bike Review

Through its entire production in the years that followed, throughout its production, the Kawasaki 250 Dirt Bike received enhancements and improvements. 

Kawasaki also made other styling adjustments and finally eliminated the electrofusion coating which caused overheated cylinder heads as well as melted pistons. 

The company replaced it with T-Treatment. It helped improve the overall performance and health of its wheeler.

Its Kawasaki 125 Dirt Bike is an off-road vehicle that is solid and sturdy. There were certain model years that featured dips and others were classified as intermediates. Overall, however, it was better than many of its rivals.

Because of this tiny trailblazer, high-performance wheelers such as that undisputed Kawasaki XK 500 came into existence. 

In addition, novice and experienced riders can benefit from a powerful and lively all-rounder in the city or the open air.

How much is a Kawasaki KX 125 worth?

between $4,500 to $7,500

Since the Kawasaki KX125 is significantly more difficult to come across, the possibility of finding one is to bring a nostalgic price hike. It will cost anywhere between $4,500 to $7,500.

Does Kawasaki make a KX125?

Kawasaki KX 125 Price

The price list for XK 125 is $4,949 for post-2000 models. XK 125 ranges from $4,949 to $5,099 in post-2000 models. However, sources for MSRPs of earlier XK versions may be somewhat obscure.

How fast does a KX125 dirt bike go?

Most 125cc two-stroke MX bikes can reach approximately 70-75 miles per hour (112-120 kilometers/hour) in the standard. They can easily reach 75 mph when you swap the rear sprocket into smaller ones (fewer teeth). Keep in mind that your bike will be screaming at that speed, and it’s not a great idea to go at that speed for long.

What was the last year of the KX125?

Kawasaki discontinued the production of the KX125 in 2008. However, Jay Cox has crafted this masterpiece into an updated version of 2018. XK 2-stroke. From a distance, the bike looks impressive. Mar 8, 2020

How many gears does a 2003 KX125 have?


Kawasaki is fortunate to have the six-speed gearbox, but it has upgraded to 125. Although five speeds are enough for most Motocross tracks, the six-speed box has two reasons.

Why did Kawasaki stop making 2 strokes?

Answer: Two-strokes walked off the market because they were unable to keep up with the ever-stretching EPA standards for emission standards. One of the features that made two-strokes appealing–the fact that they have only three moving components (crankshaft con-rod, con-rod, and piston) was also what cost them their market share.

What is the smallest Kawasaki street bike?

Kawasaki Z125 PRO

Small in size, but big in fun Small in size, but big on fun, the Kawasaki Z125PRO motorbike is a swift streetfighter that stands out. With 125cc engine capacity with a straight riding posture and street tires that respond, and a wide range of tires, you’re invited to be a rebel.

Is a KLX 125 good?

Its KLX125 is an excellent dirt bike for adults or teens, and girls because the seat height is comfortable and low, making it easy to get your feet on the ground and then quickly increase your confidence.

Is a KX250 a 4-stroke?

The XK(tm)250 motorcycle is powered by a powerful engine with a capacity of 249cc, which has a very high rev limit, as well as ample power throughout the rev range.

Are 2003 KX125 any good?

The KX125 from 2003 is possibly the most stable and safe handling 125 in its class. It stays on its path no matter which way you direct it, and the track conditions aren’t a factor. It does not shake its head, never veering off in a new direction, and does nothing you did not ask for.

What suspension does a KX125 have?

Suspension 12.2-inch Kayaba 46mm upside-down forks and 13.2-inch Kayaba shock (with 20 rebound clicks and 18 compression clicks). Wheelbase: 56.5 inches.

How much is a KX 125?

between $4,500 and $7,000.

Since the Kawasaki KX125 is significantly more difficult to come across, it is not uncommon for one to bring a nostalgic price increase. It will cost you anything between $4,500 to $7,500.

What is a Kawasaki KLX125?

It is the Kawasaki KLX125 is a Super motard bicycle produced by Kawasaki. The model is available from 2013 onwards, its dry weight was a mere 1.0 kg, and it comes with the V2, four-stroke motor. The motor achieves a maximum peak horsepower at 10.19 HP (7.4 kW) at 8000 RPM and an output torque of 10.00 Nm (1.0 kgf-m or 7.4 ft.

What is the top speed of a KLX 140?

The KLX 140R’s maximum speed is in the vicinity of 65 miles per hour. The off-road bike has 17-inch front wheels and a 14-inch rear wheel. The low seat height makes it easy to get on, and the engine is a great beginner.

Kawasaki 125 Dirt Bike XK FAQ

1. Does Kawasaki make a 125cc dirt bike?

Honda, as well as Kawasaki both, have stopped production of the dirt bikes of 125cc If you could find one that is in perfect condition is a heck of a deal. Mechanically they don’t possess much that can break them apart.

2. How fast can a KTM 125 go?

Its KTM 125 SX top speed is almost 85 miles per hour in stock conditions. Its small and light engine can deliver the kind of performance that is a winner in the championship.

3. How fast can a KTM 125 go?

Its KTM 125 SX top speed is almost 85 miles per hour in stock conditions. Its small and light engine can deliver the kind of performance that is a winner in the championship.

4. How fast does a Kawasaki KLX 140 go?

What is the speed at which the KLX 140 travel? The KLX 140R’s top speed is close to 65 miles per hour as stated by a few riders.

5. What year did Kawasaki make the KX125?

KX125. This year 2007 Kawasaki KX125 comes with a motocross 2-stroke bike with a revamped ignition system and is now able to provide more power in the mid-range and still has the best brawn when revving higher.

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