KTM 250 EXC SIX DAYS [2018 - 2020]: The Ultimate Two-Stroke Enduro Refined

Introduction

The KTM 250 EXC SIX DAYS isn’t just a motorcycle—it’s a statement. Designed for riders who demand precision, agility, and raw power in the most unforgiving terrains, this limited-edition enduro machine represents KTM’s relentless pursuit of off-road dominance. Built as a homage to the brand’s storied Six Days International Trophy victories, the 2018–2020 generation refines the formula with cutting-edge engineering, including the revolutionary TPI (Transfer Port Injection) system. After spending a day wrestling this orange beast through rocky trails, muddy forests, and steep hill climbs, I can confidently say it’s one of the most exhilarating two-strokes ever made for serious enduro enthusiasts.

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Engine Performance: Two-Stroke Brilliance Meets Modern Innovation

At the heart of the 250 EXC SIX DAYS lies a 249cc liquid-cooled two-stroke engine that’s been dragged into the 21st century. The TPI fuel injection system eliminates the carburetor, delivering precisely metered fuel directly into the transfer ports. The result? A seamless powerband that combines the instant throttle response of a traditional two-stroke with the consistency of modern fuel injection.

Twist the throttle, and the engine snarls to life with a crisp, metallic bark. Low-end torque is surprisingly tractable, allowing you to lug the bike up technical climbs without fouling plugs—a common headache with older two-strokes. Mid-range punch is where this motor truly shines, rocketing the 103.9 kg (229 lbs) machine forward with a surge that’ll have you scrambling for the next gear. The six-speed transmission is buttery-smooth, with a wide-ratio setup that’s equally at home crawling through boulder fields or screaming down fire roads at 90+ km/h (56 mph).

Fuel efficiency is a revelation for a two-stroke. KTM claims 2.55 liters per 100 km (92 mpg), and in practice, the 9-liter (2.38-gallon) tank provides a realistic 100–120 km (62–75 mi) range—enough for most enduro loops. The TPI system also slashes emissions, producing just 59.2 g/km of CO2.

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Chassis & Handling: A Scalpel in the Dirt

KTM’s chromoly steel frame is a masterpiece of flex and rigidity. At 1,482 mm (58.3") wheelbase, the bike strikes a perfect balance between high-speed stability and tight-corner agility. Throw it into a switchback, and the chassis carves through like it’s on rails, with the 26.5° rake and WP suspension working in harmony to keep the front end planted.

The WP Xplor 48 fork offers 300 mm (11.8") of travel, adjustable for preload via a clever three-position dial on the left fork leg. Out back, the WP Xplor PDS shock absorbs 310 mm (12.2") of abuse without breaking a sweat. Both ends are plush over small chatter yet resist bottoming on big hits—a setup that feels like it was tuned by mountain goats.

Standing at 960 mm (37.8"), the seat height is tall but manageable thanks to the narrow midsection. Ground clearance? A massive 370 mm (14.6"), letting you skate over logs and ruts that’d high-center lesser bikes.

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Brakes & Wheels: Stopping Power You Can Trust

Brembo’s signature touch is everywhere. Up front, a 260 mm disc paired with a twin-piston caliper delivers surgical stopping power. The rear 220 mm disc with a single-piston setup is equally progressive—no wooden feel here. Brake pads last longer than expected, even in muddy conditions.

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Competition: How It Stacks Up

Husqvarna TE 250i

The TE 250i shares the TPI engine but wraps it in a slightly softer package. Husky’s composite carbon subframe adds vibration damping, which is gentler on long rides but numbs feedback when pushing hard. Suspension is also plusher, favoring trail riders over racers.

Beta RR 250

Beta’s oil-injected two-stroke is a gem for technical terrain, with a lower seat height (940 mm/37") that’s friendlier for shorter riders. However, the KTM’s WP suspension outclasses Beta’s Sachs units in high-speed stability.

Yamaha WR250F

The four-stroke WR250F appeals to purists who prefer torque over hit. It’s smoother for marathon events but weighs 112 kg (247 lbs)—a noticeable difference when muscling through tight sections.

Verdict: The KTM dominates in aggressive racing scenarios, while competitors cater to niche preferences.

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Maintenance: Keeping Your EXC SIX DAYS in Fighting Shape

TPI System Care

• Injectors: Clean every 50 hours using Motorex Fuel System Cleaner. Clogged injectors are rare but catastrophic.
• Oil Tank: Use only synthetic injector oil (Motorex Cross Power 2T recommended). Check lines for leaks.

Air Filter

The Twin-Air foam filter is easy to access but demands frequent cleaning in dusty conditions. Upgrade to a pre-oiled, washable filter from MOTOPARTS.store for quicker swaps.

Suspension Service

WP components need fresh oil every 80–100 hours. Consider a suspension refresh kit with SKF seals for extended durability.

Brake Maintenance

Brembo pads wear evenly but stock sintered metal pads can be noisy. Swap to organic compounds for quieter operation without sacrificing bite.

Cooling System

Check coolant levels monthly. Replace with engine ice coolant for better heat dissipation during slow technical sections.

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The Six Days Touch: More Than Just Graphics

This isn’t a sticker kit—it’s a spec sheet. Highlights include:
- CNC-machined triple clamps for precise fork alignment
- Factory-style gripper seat cover
- Orange-anodized chain adjusters
- DID dirt-star rims with reinforced spokes

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Conclusion: Why It Still Matters

The 2018–2020 KTM 250 EXC SIX DAYS represents the pinnacle of two-stroke enduro evolution. It’s a bike that rewards skill, punishes complacency, and—with proper care—will outlast most riders’ courage. Whether you’re chasing trophies or just the thrill of mastering a technical climb, this machine delivers in ways that few others can match.

Ready to personalize yours? MOTOPARTS.store carries everything from performance exhausts to ergonomic upgrades—because even perfection has room for improvement.

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Specifications sheet

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