KTM 250 EXC Six Days [2017-2018]: A Rider’s Perspective on the Off-Road Champion

Introduction

The KTM 250 EXC Six Days, part of KTM’s iconic off-road lineup from 2017 to 2018, represents a refined blend of Austrian engineering and hardcore enduro DNA. Designed for riders who demand precision in the dirt, this two-stroke machine carries the legacy of KTM’s Six Days editions – bikes built to tackle the International Six Days Enduro (ISDE), the “Olympics of motorcycling.” After spending time with this orange beast, it’s clear why it remains a benchmark in the enduro world. Let’s dive into what makes this generation stand out.

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Engine Performance: Two-Stroke Fury Meets Modern Refinement

At the heart of the 250 EXC Six Days lies a 249cc liquid-cooled two-stroke engine. The 2017 model features a Mikuni carburetor, delivering that classic two-stroke hit – aggressive, raw, and thrilling. By 2018, KTM introduced the Transfer Port Injection (TPI) system, a game-changer that eliminated premixing while smoothing out power delivery.

Key takeaways from the saddle:
- 2017 Carbureted Model: Instant throttle response with a violent rush of power in the mid-to-high RPM range. Perfect for riders who enjoy tuning jets and love the ritual of premixing fuel.
- 2018 TPI Model: More linear power delivery with improved low-end torque. The fuel injection system reduces spooge and makes the bike feel surprisingly tractable on technical climbs.

Both engines share a 6-speed gearbox with a wide ratio spread. First gear crawls through rock gardens, while sixth gear hits ~110 km/h (68 mph) – enough for connecting trails. The DDS clutch (Damped Diaphragm Steel) with Brembo hydraulics offers buttery lever action, critical during hour-long enduro sprints.

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Chassis and Handling: Precision in the Dirt

KTM’s chromoly steel central-tube frame strikes a balance between flex and rigidity. At 100.5 kg (221.6 lbs) for the 2017 model and 103.5 kg (228.2 lbs) for the 2018 TPI version, the bike feels shockingly light when wrestling through singletrack. The WP Xplor 48 fork (300 mm/11.8” travel) and WP Xplor PDS rear shock (310 mm/12.2” travel) dominate the conversation here.

On-trail impressions:
- The fork’s open cartridge design soaks up square-edged roots without deflecting. Preload adjusters let you stiffen it up for faster fire roads.
- The PDS (Progressive Damping System) rear suspension eliminates linkage maintenance, a boon for mud-plugging riders. It’s plush initially but firms up predictably during hard bottom-outs.

With a 26.5° rake and 1482 mm (58.3”) wheelbase, the bike flicks between trees like a trials machine. Standover height is manageable at 960 mm (37.8”), though shorter riders may still need a lowering kit. Ground clearance (370 mm/14.6”) shrugs off logs and ruts.

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Brakes and Wheels: Stopping Power That Inspires Confidence

Brembo’s 220 mm (8.7”) discs front and rear provide surgical stopping power. The 2018 model upgrades to Brembo floating calipers, which I appreciated during steep, loose descents. Unlike some enduro bikes that prioritize weight savings over brake feel, the KTM’s setup lets you drag the rear brake through switchbacks without fade.

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Competition: How the Six Days Stacks Up

Husqvarna TE 250

The TE 250 shares the same engine but uses a composite carbon fiber subframe. It’s slightly heavier at 104 kg (229 lbs) but offers a plusher seat. Husky’s linkage rear suspension is better for motocross-track jumps but requires more maintenance.

Yamaha WR250F

Yamaha’s four-stroke rival is 10 kg (22 lbs) heavier and lacks the KTM’s explosive power. However, fuel range is better (7.5L vs 9L), and the engine is virtually bulletproof.

Beta RR 250

Beta’s two-stroke charms with a mellower powerband and lower seat height (935 mm/36.8”). However, the KTM’s WP suspension and Brembo brakes outclass Beta’s Sachs components in technical terrain.

Verdict: The Six Days excels for riders prioritizing agility and cutting-edge tech. The TPI model (2018) is a revelation for those tired of carb tuning.

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Maintenance: Keeping the Orange Beast Alive

Critical Service Points

1. Piston Replacements: Two-strokes demand frequent top-end refreshes. Plan for a new piston every 50-70 hours (hard riding) or 100 hours (trail use).
2. Air Filter Care: The twin-air foam filter needs cleaning after every muddy ride. Consider a pre-oiled Twin-Air replacement from MOTOPARTS.store for quick swaps.
3. TPI System Checks (2018+): Inspect injectors annually and use ethanol-free fuel to prevent clogs.
4. Suspension Servicing: Rebuild the Xplor fork seals every 100 hours – a job made easier with MOTOPARTS.store’s WP seal driver kit.

Upgrade Recommendations

• Sprockets and Chains: Swap to a 13T front sprocket for tighter trails or a 50T rear for desert runs.
• Handguards: Acerbis Rally Pro guards add crash protection without weight penalty.
• Skid Plate: KTM’s OEM plate is thin; upgrade to a TMD composite guard for rockier terrain.

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Conclusion: A Modern Classic for the Dirt-Obsessed

The KTM 250 EXC Six Days [2017-2018] isn’t just a dirt bike – it’s a passport to places most riders never reach. The 2017 carbureted model satisfies purists, while the 2018 TPI version redefines two-stroke usability. Yes, maintenance is more involved than a four-stroke, but the payoff is a machine that feels alive beneath you, charging up hillsides with a scream that echoes through the trees.

Whether you’re prepping for an enduro race or chasing horizon lines in the backcountry, this KTM begs to be ridden hard. And when it’s time to rebuild or upgrade, MOTOPARTS.store has the expertise and parts to keep your Six Days fighting fit for another decade of dirt.

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Specifications sheet

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