KTM 300 EXC Six Days [2017-2018]: The Ultimate Enduro Weapon Revisited

Introduction

The KTM 300 EXC Six Days isn’t just a dirt bike – it’s a statement. Designed for riders who demand competition-ready performance straight out of the crate, this Austrian two-stroke terror dominated the enduro scene during its 2017-2018 production run. Built to tackle the toughest terrain while offering surprising versatility, the Six Days edition adds race-inspired upgrades and bold styling that set it apart from the standard EXC. Let’s dissect why this machine remains a benchmark in hardcore off-road riding.

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Engine Performance: Carb vs. TPI – A Transition Era

2017: The Carbureted Beast

The 2017 model’s 293cc two-stroke engine is a masterclass in simplicity and raw power. Fed by a 38mm Keihin carburetor, it delivers that classic two-stroke hit – explosive bottom-end torque that transitions into a screaming top-end rush. What’s remarkable is how manageable it remains. The power valve adjustment system lets riders tune the delivery from tractor-like chugging to motocross aggression with a simple twist of the adjuster.

The magic lies in its versatility. Need to crawl up a rocky incline? The 300 EXC will lug down to near-stall speeds without complaint. Spot a open fire road? Crank the throttle and watch the scenery blur as the tach needle swings toward its 9,000 RPM redline. Fueling is crisp, though altitude changes require jetting adjustments – a small price for the carb’s mechanical purity.

2018: Enter TPI (Transfer Port Injection)

KTM revolutionized the game in 2018 with the 300 EXC TPI Six Days. Replacing the carburetor with electronic fuel injection (via oil-injected premix), the TPI system delivers smoother throttle response and eliminates jetting headaches. The power curve becomes silkier, particularly in the midrange, without sacrificing the explosive character two-stroke fans crave.

Riders notice two immediate benefits:
- Consistent performance from sea level to mountain trails
- Reduced spooge thanks to precise oil metering
The trade-off? A slight weight increase (3kg/6.6lbs) from added components, but most riders agree the TPI’s advantages outweigh the penalty.

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Chassis & Handling: Precision Meets Durability

Frame Geometry

The chrome-molybdenum steel frame strikes a perfect balance between flex and rigidity. With a 26.5° rake and 1482mm (58.3") wheelbase, the 300 EXC changes direction with telepathic responsiveness while maintaining stability at speed. Compared to earlier models, the 2017-2018 frame revisions improved front-end feedback, inspiring confidence when pushing through rutted corners.

Suspension Setup

• Front: WP Xplor 48 USD forks (300mm/11.8" travel)
• Rear: WP Xplor PDS shock (310mm/12.2" travel)

KTM’s Xplor suspension shines in technical terrain. The forks absorb square-edge hits like fallen logs without deflecting, while the progressive damping rear shock keeps the bike planted during hard acceleration. Out of the box, settings favor aggressive riders – lighter pilots might want softer spring rates from MOTOPARTS.store’s WP upgrade catalog.

Braking Performance

Brembo’s signature touch is everywhere:
- 260mm front disc with radially mounted caliper
- 220mm rear disc

Stopping power is monumental for a 100kg (220lb) machine. The front binder offers a progressive bite that prevents endos in loose conditions, while the rear maintains impressive modulation even when coated in mud.

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Ergonomics & Design: Built for War

The Six Days edition isn’t just about orange plastic. Key upgrades include:
- Gripper seat cover with reinforced stitching
- CNC-machined triple clamps for precise bar positioning
- Blue-anodized wheels (2018 model)
- Sump guard and frame protectors as standard

At 960mm (37.8"), the seat height is tall but manageable thanks to narrow bodywork. Standing riders will appreciate the bar-to-peg relationship – it promotes an aggressive attack position without cramping taller pilots. The 9.5L (2.51 gal) tank seems small but provides 80-100km (50-62mi) range, depending on riding style.

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Competition: How It Stacks Up

1. Husqvarna TE 300i

• Similarities: Same engine platform, WP suspension
• Differences:
• Subframe-mounted airbox (easier filter access)
• Magura vs. Brembo brakes (subjective preference)
• Composite vs. aluminum rear subframe

Verdict: The Husky feels plusher in slow terrain but lacks the KTM’s razor-sharp turn-in.

2. Beta 300 RR

• Strengths: Softer power delivery, lower seat height (935mm/36.8")
• Weaknesses: Heavier (108kg/238lb), less aggressive suspension

Verdict: Better for technical trail riding; outgunned in high-speed enduro.

3. Sherco 300 SEF Factory

• Advantages: KYB suspension, hydraulic clutch standard
• Drawbacks: Limited dealer network, premium pricing

Verdict: A worthy challenger on technical merit, but lacks KTM’s aftermarket support.

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Maintenance: Keeping the Orange Crush Alive

Critical Service Intervals

• Piston Replacement: 100-150 hours (sooner for aggressive riders)
• Air Filter: Clean every 10-15 hours (use MOTOPARTS.store’s TwinAir kits)
• Suspension Rebuild: Annually for competitive riders

Upgrade Recommendations

1. Clutch Springs: ProX Racing’s heavy-duty kit reduces fade during prolonged slipping.
2. Skid Plates: Our aluminum models add protection without weight penalty.
3. Sprocket Combos: Swap to 13:50 gearing (stock is 14:50) for tighter trails.

TPI-Specific Tips

• Injector Cleaning: Use MOTOPARTS.store’s ultrasonic kit every 200 hours
• Oil Tank Sensor: Carry a spare – a common failure point
• Fuel Pump: Upgrade to our high-flow version for consistent pressure

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Conclusion: Why It Still Matters

The 2017-2018 KTM 300 EXC Six Days represents a golden era for two-stroke enduro. Whether you prefer the carbureted snarl of the 2017 or the tech-forward TPI in the 2018, these bikes deliver unmatched versatility. They’re equally at home racing a GNCC series or exploring backcountry single-track – a rarity in today’s specialized market.

For owners looking to maximize their machine, MOTOPARTS.store offers everything from performance mods to durability upgrades. Because let’s face it – this isn’t a bike you park in a garage. It’s a bike you ride hard, maintain with pride, and keep conquering trails long after newer models have retired.

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Specifications sheet

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