The 2018 Kawasaki KX100 is a potent mini-motocross bike, a staple in Kawasaki's off-road lineup for years. This two-stroke, dirt bike features a lightweight, aggressive chassis designed for competitive racing and spirited trail riding. Primarily offered in a single trim, its popularity stems from its powerful engine and agile handling, making it a favorite for aspiring racers and experienced riders looking for a nimble machine. New pricing typically ranged from approximately $4,599 to $4,699.
The Good
The 2018 KX100 excels with its exhilarating two-stroke power, sharp handling, and race-ready design. It offers a thrilling, engaging ride for performance enthusiasts while its proven Kawasaki reliability and accessible price point appeal to practical buyers seeking great value and a durable machine for the track or trails.
The Bad
Potential owners should watch for normal wear and tear associated with aggressive riding, particularly on the engine, clutch, and suspension components. Due to its nature as a performance-oriented machine, frequent maintenance is crucial to prevent premature component failure.
2018 Kawasaki KX100: Quick Overview
- Engine: 99cc liquid-cooled, two-stroke, single-cylinder
- Bore x Stroke: 52.5 x 46.8 mm
- Compression Ratio: 9.6:1
- Fuel System: Keihin PWK38S, dual intake
- Ignition: Digital CDI
- Transmission: 6-speed
- Clutch: Wet, multi-disc
- Final Drive: D.I.D. 428 VIX chain
- Horsepower: Approximately 25-27 hp (estimated, as official figures are often not published for competition bikes)
- Fuel Economy: Not officially rated as it's a competition off-road vehicle, but typically around 20-30 MPG depending on riding style and conditions.
- 0-60 Times: Not applicable/measured for this type of vehicle.
- Towing Capacity: Not applicable.
- Frame: High-tensile steel, semi-double cradle
- Front Suspension: 36mm inverted telescopic fork with 20-way compression and 18-way rebound damping
- Rear Suspension: Uni-Trak with adjustable preload, 16-way compression and 16-way rebound damping, spring rate 3.8 kgf/mm
- Front Tire: 70/100-17 40M
- Rear Tire: 90/100-14 49M
- Front Brakes: Disc
- Rear Brakes: Disc
- Ground Clearance: 13.2 inches
- Seat Height: 32.7 inches
- Wheelbase: 51.4 inches
- Curb Weight: 160.7 lbs
- Fuel Capacity: 1.7 gallons
- Trim-Level Features: The 2018 KX100 comes as a single, competition-ready trim. Key features include an adjustable handlebar for customizable ergonomics, petal disc brakes for enhanced stopping power and heat dissipation, durable wheels and tires suitable for off-road conditions, and a high-performance exhaust system. It also boasts a lightweight chassis and powerful engine tuned for motocross performance.
2018 Kawasaki KX100 Specifications
Vehicle Information
| Year | 2018 |
| Make | Kawasaki |
| Model | KX100 |
| Trim | - |
| Style | - |
| Type | Motorcycle |
| Category | Motorcycle |
Manufacturing Details
| Made In | Japan |
| Manufacturing City | AKASHI |
Dimensions
| Doors | - |
| Curb Weight | - |
| Gross Vehicle Weight Rating | - |
| Overall Height | - |
| Overall Length | - |
| Overall Width | - |
| Wheelbase Length | - |
| Standard Seating | - |
Engine & Performance
| Engine | 99cc 1cyl |
| Engine Size | 99L |
| Engine Cylinders | 1 |
| Transmission | - |
| Transmission Type | - |
| Transmission Speeds | - |
| Drivetrain | - |
Additional Features
| Anti-Brake System | - |
| Steering Type | - |
Pricing
| Manufacturer Suggested Retail Price (MSRP) | - |
| Invoice Price | - |
| Delivery Charges | - |
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What Problems Does the 2018 Kawasaki KX100 Have?
The 2018 Kawasaki KX100, like most high-performance off-road motorcycles, is built for demanding use, and its reliability is largely contingent on proper maintenance and riding habits. Frequently reported concerns, common across many two-stroke motocross bikes of this era, revolve around the wear and tear of internal engine components. Owners often report needing to rebuild the top-end (piston, rings, cylinder) after a significant number of hours, typically in the range of 40-80 hours of hard riding, though this can vary greatly. Clutch wear is another common item, especially if the bike is used extensively in demanding conditions like mud or hard pack with aggressive throttle control. Suspension components, while high-quality, will require regular servicing, including seal replacements and oil changes, to maintain optimal performance and prevent leaks. There are no widespread, commonly reported mechanical failures specific to the 2018 model year that indicate a significant design flaw. However, as with any used performance motorcycle, a pre-purchase inspection by a qualified mechanic is highly recommended to identify any existing issues. Recalls are rare for these specialized machines unless a safety critical component is found to be defective across a production run. Owners should always check the Kawasaki official website or NHTSA for any potential recalls relevant to their specific VIN. Long-term reliability hinges on diligent adherence to the maintenance schedule outlined in the owner's manual, including regular air filter cleaning/replacement, spark plug changes, and proper chain lubrication and adjustment. Neglecting these can lead to more significant and costly repairs.
How long will the 2018 Kawasaki KX100 last?
Estimating average mileage for a 2018 Kawasaki KX100 is challenging as these bikes are often measured in operating hours rather than miles, due to their off-road use. A dedicated motocross rider might accumulate 20-40 hours per season. With meticulous maintenance, including regular top-end rebuilds every 40-60 hours and bottom-end work every 100-150 hours, these bikes can last for many years, potentially 5-10 years or more if used seasonally. However, the durability of engine components is directly tied to the quality of maintenance and the severity of riding. Weaknesses over time, if not properly maintained, include accelerated wear on the piston, rings, cylinder, and crank bearings. Transmission and clutch components are generally robust but will eventually require attention with high usage. The chassis and suspension can hold up well with regular care and rebuilds.
What Technology & Safety Features are Included?
The 2018 Kawasaki KX100 is a purpose-built competition dirt bike, and as such, it is intentionally stripped of the electronic amenities and safety features typically found in street-legal vehicles. There is no built-in technology in the realm of infotainment, navigation, or advanced driver-assistance systems. The focus is purely on performance and rider control. The bike features a simple, functional instrument cluster that typically includes an hour meter and a basic speedometer, essential for tracking maintenance intervals and monitoring speed during practice or racing. Entertainment systems are non-existent, as the auditory experience is dominated by the powerful two-stroke engine's roar. Safety features are primarily rider-centric, relying on the rider's skill and protective gear. The braking system consists of petal disc brakes front and rear, designed for strong, consistent stopping power in off-road conditions. The suspension is adjustable, allowing riders to tune it to their preferences and the terrain, which contributes to overall control and stability. Optional features might include aftermarket exhaust systems for enhanced performance, different gearing for specific track conditions, or upgraded suspension components. Crash-test ratings are not applicable to motocross bikes, as they are not designed or tested for road-based collision safety. The primary safety considerations for the KX100 revolve around rider skill, appropriate riding environment, and the use of comprehensive protective gear such as helmets, goggles, boots, and body armor.
What Colors Options are Available?
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In the meantime, feel free to explore the other sections for more content.
In the meantime, feel free to explore the other sections for more content.
2018 Kawasaki KX100 Prices and Market Value
When new, the 2018 Kawasaki KX100 typically had an MSRP in the range of $4,599 to $4,699. As with most performance off-road motorcycles, depreciation is noticeable after the initial purchase. Current used market prices for a 2018 KX100 can vary significantly based on condition, hours of use, and any modifications. You might find them ranging from $2,000 to $3,500. Factors heavily affecting resale value include the overall condition of the engine and suspension, the number of hours on the bike, the presence of any desirable aftermarket parts, and whether it has been maintained meticulously. Bikes that have been raced hard and neglected will fetch considerably less than well-maintained, low-hour examples.
2018 Kawasaki KX100 Cost of Ownership
Ownership costs for a 2018 Kawasaki KX100 are primarily driven by maintenance and repairs. Insurance is generally inexpensive for off-road dirt bikes, often optional. Fuel costs are moderate, given its 99cc two-stroke engine. However, regular maintenance is essential and can be costly: oil changes, air filter cleaning, spark plug replacement, and chain/sprocket wear are recurring expenses. More significant are potential engine rebuilds (top-end, bottom-end) which can cost several hundred to over a thousand dollars, depending on labor and parts. Suspension servicing also adds to the bill. Overall, it's not an economical vehicle to own if you neglect its needs, but for a performance machine, its costs are commensurate with its capabilities. It is costly to own if maintenance is deferred.
2018 Kawasaki KX100 Fuel Efficiency
Fuel Type
Gasoline
Fuel Capacity
-
City Mileage
-
Highway Mileage
-
2018 Kawasaki KX100 Warranty
Basic
Original warranty
0 months / No data
Estimated remaining
Expired
Powertrain
Original warranty
0 months / No data
Estimated remaining
Expired
Rust
Original warranty
0 months / No data
Estimated remaining
Expired
2018 Kawasaki KX100 Insurance
Insurance for a 2018 Kawasaki KX100 is moderately priced, reflecting its status as a Motorcycle with strong safety ratings and
reasonable repair costs.
reasonable repair costs.
How Does the 2018 Kawasaki KX100 Compare to Other Motorcycle?
The 2018 Kawasaki KX100 competes primarily with other 100cc-125cc class mini-motocross bikes. Its key rivals include the 2018 KTM 105 SX, Yamaha YZ100 (though a YZ125 is more common), and Suzuki RM100 (if available in that year, or similar small displacement RM).
Performance: The KX100 is renowned for its strong mid-range and top-end power delivery, offering a thrilling, aggressive ride. The KTM 105 SX often boasts a slightly broader powerband and sometimes more refined suspension out of the box, giving it a slight edge in overall track performance for experienced riders. Yamaha's offerings, like the YZ125, will have a larger displacement and more power, but also a higher price point and different class.
Features: All these bikes are competition-focused and share similar basic features: liquid-cooled two-stroke engines, manual clutches, 6-speed transmissions, and adjustable suspension. The KX100's strengths lie in its well-proven platform and effective suspension tuning for its class. KTMs often feature higher-spec components like Renthal handlebars and sometimes more premium suspension internals.
Reliability: Kawasaki has a strong reputation for durable engines when properly maintained, and the KX100 is no exception. KTMs are also generally reliable, but some riders report that their more exotic components might require more specialized care. Suzuki's smaller displacement dirt bikes have also historically been quite robust.
Price: The KX100 typically sits at a competitive price point, often being slightly more affordable than a comparable KTM when new. Used prices reflect this, with the KX100 generally being a very good value proposition.
Alternatives: For riders seeking a slightly more user-friendly or trail-oriented experience in a similar displacement, a 2018 Yamaha TT-R125LE could be considered, though it's a four-stroke and less performance-oriented. If budget is less of a concern and maximum performance is desired, a used KTM 105 SX would be a strong contender. However, for pure motocross performance at a strong value, the 2018 Kawasaki KX100 remains a top-tier choice in its class.
Performance: The KX100 is renowned for its strong mid-range and top-end power delivery, offering a thrilling, aggressive ride. The KTM 105 SX often boasts a slightly broader powerband and sometimes more refined suspension out of the box, giving it a slight edge in overall track performance for experienced riders. Yamaha's offerings, like the YZ125, will have a larger displacement and more power, but also a higher price point and different class.
Features: All these bikes are competition-focused and share similar basic features: liquid-cooled two-stroke engines, manual clutches, 6-speed transmissions, and adjustable suspension. The KX100's strengths lie in its well-proven platform and effective suspension tuning for its class. KTMs often feature higher-spec components like Renthal handlebars and sometimes more premium suspension internals.
Reliability: Kawasaki has a strong reputation for durable engines when properly maintained, and the KX100 is no exception. KTMs are also generally reliable, but some riders report that their more exotic components might require more specialized care. Suzuki's smaller displacement dirt bikes have also historically been quite robust.
Price: The KX100 typically sits at a competitive price point, often being slightly more affordable than a comparable KTM when new. Used prices reflect this, with the KX100 generally being a very good value proposition.
Alternatives: For riders seeking a slightly more user-friendly or trail-oriented experience in a similar displacement, a 2018 Yamaha TT-R125LE could be considered, though it's a four-stroke and less performance-oriented. If budget is less of a concern and maximum performance is desired, a used KTM 105 SX would be a strong contender. However, for pure motocross performance at a strong value, the 2018 Kawasaki KX100 remains a top-tier choice in its class.
Final Verdict: Is the 2018 Kawasaki KX100 a Good Motorcycle?
The 2018 Kawasaki KX100 is an excellent choice for aspiring motocross racers transitioning from smaller bikes or experienced riders seeking a nimble, powerful, and engaging machine for track days or aggressive trail riding. It's ideal for younger riders developing their skills or smaller-statured adults looking for a competitive 100cc class bike. It is definitely worth buying, especially on the used market, as it offers fantastic performance for its price. Buying used is generally recommended due to the natural depreciation of off-road motorcycles. Focus on bikes with documented maintenance history and low operating hours. The single trim offers a race-ready package, so specific trim considerations are minimal. If you prioritize a thrilling, competitive, and agile ride, the KX100 is a superb option.
Eugene S
Eugene is an automotive enthusiast with over 15 years of experience in the used car market. As a writer at VINCheck.info, he brings deep industry insight and a passion for cars, helping readers make smart, informed decisions. Eugene has written hundreds of used car reviews and is known for breaking down complex automotive topics into clear, actionable advice. Over the years, he has driven and worked on a wide range of vehicles—starting with tuning street cars in his early days and eventually focusing on performance upgrades and reliability improvements. Today, he specializes in evaluating used vehicles through the lens of real-world ownership and enthusiast needs. A longtime fan of Porsche, Eugene especially appreciates vehicles that blend durability with driving enjoyment.