Kawasaki KLX 125 Supermoto (D-Tracker 125) [2010-2012]: A Nimble Urban Playground Explorer

Introduction

The Kawasaki KLX 125 Supermoto, also marketed as the D-Tracker 125 in Japan and select regions, is a pint-sized powerhouse designed for riders who crave agility in urban jungles and light off-road adventures. Built between 2010 and 2012, this model generation strikes a balance between approachable performance and rugged Supermoto styling. With its lightweight chassis, punchy 125cc engine, and street-focused tires, the KLX 125 isn’t just a motorcycle—it’s a gateway to urban exploration. Let’s dive into what makes this bike a standout in its class.

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Design & Ergonomics: Compact, Bold, and Accessible

The KLX 125 Supermoto wears Kawasaki’s signature aggression in a compact package. Its sharp, angular bodywork—available in bold colors like Ebony Black, Lime Green, and Bright White/Candy Persimmon Red—gives it a big-bike attitude. The 35 mm inverted front fork and perimeter steel frame hint at its dirt bike DNA, while the 14-inch wheels wrapped in street tires (100/80-14 front, 120/80-14 rear) cement its Supermoto identity.

Key Highlights:
- Low Seat Height: At 805 mm (31.7 inches), the seat is accessible for shorter riders and beginners.
- Lightweight Build: A dry weight of 114 kg (251 lbs) makes it easy to maneuver through traffic or pivot on tight trails.
- Functional Dashboard: The digital panel includes a speedometer, tachometer, and FI warning lights—a rarity in this segment.

The riding position is upright, with wide handlebars offering leverage for quick direction changes. Despite its compact size, the bike doesn’t feel cramped, even for taller riders tackling short commutes.

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Engine Performance: Peppy, Refined, and Fuel-Efficient

At the heart of the KLX 125 lies a 124cc air-cooled, single-cylinder, four-stroke engine with a SOHC 2-valve configuration. While its 10.3 HP @ 8,000 RPM and 10 Nm torque @ 6,400 RPM won’t set speed records, the engine thrives in stop-and-go traffic and short bursts of acceleration.

Notable Features:
- Fuel Injection: The Keihin FI system (ø20 mm throttle body) delivers crisp throttle response and eliminates carburetor hassles.
- 5-Speed Gearbox: Smooth shifts and a tall fifth gear make highway cruising (up to ~90 km/h or 56 mph) surprisingly relaxed.
- Low Maintenance: Air cooling and a forced lubrication system simplify upkeep.

Riding the KLX 125 feels like piloting a hyperactive terrier—it’s eager to dart through gaps in traffic and thrives in environments where larger bikes feel cumbersome. The engine’s powerband is linear, with a satisfying pull from 5,000 RPM onward.

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Handling & Suspension: Agile Meets Stable

The KLX 125’s chassis is where it truly shines. The 26° rake and 94 mm (3.7 inches) of trail strike a balance between quick steering and stability. Paired with 150 mm (5.9 inches) of front wheel travel and 180 mm (7.1 inches) at the rear (via Kawasaki’s Uni-Trak suspension), the bike soaks up potholes and curbs without feeling wallowy.

On-Road Behavior:
- Flickable: The short 1,255 mm (49.4-inch) wheelbase allows razor-sharp turns.
- Confident Braking: The 240 mm front disc and 190 mm rear disc provide ample stopping power for city speeds.
- Tire Grip: The chunky 120/80-14 rear tire offers surprising cornering traction.

Off-road, the 230 mm (9.1-inch) ground clearance lets you tackle gravel paths or grassy fields with ease—just don’t expect to conquer rocky trails on those street tires.

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Urban vs. Light Off-Road: A Dual-Personality Machine

City Commuting:
- Filtering Master: The narrow 770 mm (30.3-inch) width slips through traffic effortlessly.
- Fuel Efficiency: The 7-liter (1.85-gallon) tank delivers ~250 km (155 miles) per fill-up.
- Parking-Friendly: Its compact dimensions make it a dream for crowded urban centers.

Weekend Adventures:
Swap the stock tires for dual-sport rubber, and the KLX 125 transforms into a capable backroad explorer. The suspension handles fire roads gracefully, and the torquey low-end power helps crawl over roots or loose gravel.

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Competition: How Does It Stack Up?

The KLX 125 Supermoto faces stiff competition in the lightweight Supermoto segment:

1. Yamaha WR125X:
2. Pros: Slightly more power (15 HP), 6-speed gearbox.
3. Cons: Higher seat height (870 mm/34.3 inches), carbureted engine.

4. Verdict: The Yamaha is sportier but less beginner-friendly.

5. Honda CRF150L:

6. Pros: Larger 149cc engine, longer suspension travel.
7. Cons: Heavier (132 kg/291 lbs), less agile on pavement.

8. Verdict: Better for off-road purists; less urban-focused.

9. Beta RR 125 4T:

10. Pros: Premium components, race-ready suspension.
11. Cons: Higher price, maintenance-intensive.
12. Verdict: Overkill for casual riders.

KLX 125’s Edge: Fuel injection, low seat height, and Kawasaki’s reliability make it ideal for urban riders dabbling in light off-roading.

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Maintenance: Keeping Your KLX 125 in Prime Shape

The KLX 125 is a low-maintenance machine, but these tips will ensure longevity:

1. Oil Changes:
2. Use SAE 10W-40 oil (1.0L with filter). Replace every 3,000 km (1,865 miles).

3. MOTOPARTS.store Recommendation: Synthetic oils for smoother shifts.

4. Valve Adjustments:

5. Check every 6,000 km (3,730 miles). Intake: 0.04–0.08 mm, Exhaust: 0.08–0.12 mm (cold).

6. Chain Care:

7. Clean and lubricate the 122-link chain regularly. Adjust tension to 25–35 mm (1–1.4 inches).

8. Brake Fluid:

9. Replace DOT 4 fluid every two years.

10. Tire Pressure:

11. Front: 1.5 bar (22 psi), Rear: 1.7 bar (25 psi).

12. Air Filter:

13. Clean foam filter with mild detergent; oil lightly after drying.

Pro Tip: Upgrade to a high-flow air filter and aftermarket exhaust for a slight power boost—available at MOTOPARTS.store.

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Conclusion: The Joy of Simple Riding

The Kawasaki KLX 125 Supermoto isn’t about raw power or cutting-edge tech—it’s about rediscovering the fun of motorcycling. Whether you’re weaving through city traffic, practicing wheelies in a parking lot, or exploring dirt paths, this bike delivers grins per gallon. Its forgiving nature makes it perfect for new riders, while its mod-friendly design appeals to tinkerers.

For owners looking to personalize their KLX 125, MOTOPARTS.store offers everything from performance upgrades to aesthetic tweaks. Because even the most playful bikes deserve a little customization.

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Specifications sheet

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