KTM 250 EXC SIX DAYS [2021 - 2022]: A Two-Stroke Masterclass for Hardcore Enduro

Introduction

The KTM 250 EXC SIX DAYS isn’t just a dirt bike—it’s a statement. Designed for riders who demand precision, agility, and raw power in the most unforgiving terrain, this two-stroke enduro machine represents KTM’s relentless pursuit of off-road dominance. Built for the annual International Six Days Enduro (ISDE) competition, the SIX DAYS edition adds race-ready refinements to an already exceptional platform. Having recently thrown a leg over a 2022 model, I can confirm: this bike is as thrilling as it is capable. Let’s dissect why it remains a benchmark in the 250cc enduro segment.

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Engine Performance: TPI Revolution Meets Two-Stroke Fury

At the heart of the 250 EXC SIX DAYS lies a 249cc liquid-cooled two-stroke engine, but forget everything you know about carbureted screamers. KTM’s Transfer Port Injection (TPI) system transforms the riding experience. Gone are the days of fussy jetting or fuel mixing—this bike drinks straight from the pump while automatically injecting oil into the combustion chamber. The result? A crisp throttle response and linear power delivery that rivals four-strokes in controllability.

Twist the grip, and the engine builds momentum with a metallic snarl, pulling hard from mid-range to a frenetic top-end. The 6-speed gearbox is impeccably spaced, allowing you to lug third gear through technical sections or scream down fire roads in sixth. What surprised me most was the tractability—the TPI system eliminates the "hit" typical of traditional two-strokes, making it easier to manage slippery roots or steep climbs without constant clutch work.

Fuel efficiency is staggering for a two-stroke: 2.55 L/100 km (92.24 mpg) means you’ll conquer 150+ km (93+ miles) on the 9.5L (2.51-gallon) tank. That’s a game-changer for endurance events.

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Chassis and Handling: Lightweight Agility Meets Austrian Precision

Weighing just 103.9 kg (229 lbs) dry, the 250 EXC SIX DAYS feels like a mountain bike on steroids. The chromoly steel frame strikes a perfect balance between rigidity and flex, inspiring confidence when railing berms or deflecting off rocks. At 1482 mm (58.3 inches), the wheelbase is compact enough for tight singletrack yet stable at speed.

WP suspension is the star here. The 48mm XPLOR-USD fork (300mm travel) and PDS rear shock (310mm travel) are plush on small bumps and progressive on big hits. During my test ride, I hammered through rock gardens and landed flat from 3-foot drops without a hint of bottoming. Riders can fine-tune preload and damping, though the stock setup works brilliantly for most terrain.

Brembo brakes provide nuclear stopping power. The twin-piston front caliper bites a 220mm rotor with surgical precision, while the rear offers ample modulation for technical descents.

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Off-Road Capability: Born to Conquer

With 370mm (14.6 inches) of ground clearance and a grippy seat height of 960mm (37.8 inches), the 250 EXC SIX DAYS towers over obstacles. Taller riders will appreciate the spacious ergonomics, though shorter pilots might struggle at stoplights. The Michelin Enduro Medium tires (21” front, 18” rear) claw through mud and loose dirt, while the 26.5° rake (2021) and 23.6° rake (2022) ensure razor-sharp steering.

Electric start (a 2022 upgrade from kick-only predecessors) is a godsend after stalling on a hillside. The lithium-ion battery saves weight and cranks reliably, even in freezing temps.

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Competition: How It Stacks Up

The 250cc enduro segment is fiercely competitive. Here’s how the KTM holds its ground:

• Husqvarna TE 250i: Shares the same TPI engine but uses a composite frame and different suspension tuning. The Husky feels slightly plusher in slow terrain, but the KTM’s steel frame offers better feedback at speed.
• Beta RR 250: A carbureted two-stroke with a loyal following. The Beta’s low-end grunt is addictive, but it lacks the KTM’s fuel-injection refinement and modern electronics.
• Yamaha WR250F: A four-stroke alternative with broader torque and smoother power. However, the Yamaha weighs 113 kg (249 lbs)—a significant penalty in tight trails.

The KTM strikes the best balance between weight, power, and technology, though hardcore traditionalists might prefer the Beta’s analog feel.

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Maintenance: Keeping the Orange Beast Alive

Owning a 250 EXC SIX DAYS requires diligence, but MOTOPARTS.store has you covered:

1. TPI System: Inspect oil injector lines annually and use quality 2T oil (we recommend Motorex Cross Power 2T).
2. Clutch: The DDS clutch is durable but demands regular oil changes (every 30 hours). Upgrade to a Rekluse basket for extreme abuse.
3. Suspension: Service WP forks every 80-100 hours. Consider SKF seals for muddy conditions.
4. Brakes: Replace Brembo pads with sintered units for longer life. Flush fluid with DOT 5.1 annually.
5. Chain: The 520 chain stretches quickly—install a DID VT2 X-Ring for longevity.

Pro Tip: Keep tire pressure at 1.0 BAR (14.5 PSI) for optimal grip.

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Conclusion

The KTM 250 EXC SIX DAYS [2021-2022] is a rare beast: a two-stroke that’s as user-friendly as it is wild. Whether you’re racing enduros or exploring backcountry trails, this bike delivers adrenaline and reliability in equal measure. And when it’s time to rebuild, upgrade, or tweak, MOTOPARTS.store has the parts and expertise to keep your SIX DAYS fighting fit. Now, go carve some ruts.

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Specifications sheet

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