KTM 300 EXC (2008–2011): The Two-Stroke Torque Monster That Redefined Enduro

Introduction

The KTM 300 EXC isn’t just a dirt bike—it’s a legend. From 2008 to 2011, this Austrian two-stroke dominated enduro trails, hare scrambles, and the hearts of riders who craved raw power paired with featherweight agility. Designed for riders who laugh at steep climbs and technical singletrack, the 300 EXC carved its reputation as a torque-rich, maintenance-friendly machine that refuses to compromise. Having spent a day thrashing a well-kept 2011 model through muddy forests, rocky ascents, and open fire roads, I’m here to break down why this generation remains a benchmark for hardcore off-roaders.

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Engine Performance: Two-Stroke Fury, Four-Stroke Manners

At the core of the 300 EXC lies a 293cc liquid-cooled two-stroke engine—a masterpiece of simplicity and brute force. With a bore and stroke of 72 x 72 mm and a compression ratio of 12.8:1, this single-cylinder beast delivers 23 hp (17 kW) at 6,120 rpm. But numbers don’t tell the full story.

Power Delivery: Controllable Chaos

Twist the throttle, and the 300 EXC awakens with a linear surge that feels almost four-stroke-like at low RPMs. The Keihin PWK36 carburetor (a staple across this generation) ensures crisp response, while the adjustable exhaust control (TVC) lets riders tweak power characteristics. Swap the TVC springs, and you can mellow the hit for slick roots or unleash a violent mid-range punch for hill-climbing glory.

The real magic happens between 4,000 and 6,000 RPM. This is where the 300 EXC owns its rivals. The mid-range torque is ludicrous—think “tractor meets rocket ship.” It’ll loft the front wheel in third gear without clutch fanfare, and the 6-speed transmission (introduced in 2011) keeps the powerband wide and usable. That said, the top-end flattens out quickly, a reminder that this engine prioritizes grunt over rev-happy theatrics.

Electric Start: A Game-Changer (Mostly)

KTM’s pioneering electric start debuted on the 300 EXC-E models, and while early versions (2008–2009) suffered from occasional starter gear engagement issues (“milkshake machine” noises), the system matured by 2011. Pair it with the kickstarter for peace of mind, but once warm, that button is a lifeline on sidehill restarts.

Fuel Thirst: The Price of Fun

Two-strokes aren’t known for sipping fuel, and the 300 EXC is no exception. Expect ~10 km/L (23.5 mpg) when ridden hard—enough for a 95 km (59 mi) range from its 9.5L (2.5 gal) tank. Carry extra premix on long adventures.

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Handling: Lightweight Precision Meets WP Wizardry

Chassis: Slim, Stiff, and Ready to Dance

The 300 EXC’s chromoly steel frame strikes a balance between lateral stiffness and flex, absorbing trail chatter while remaining razor-sharp in corners. At 103 kg (227 lbs) dry, it’s 10–15 kg (22–33 lbs) lighter than most 450 four-strokes, and you feel it immediately. Flicking the bike through switchbacks requires minimal effort, and the 945 mm (37.2 in) seat height—tall by today’s standards—keeps your knees clear of the handlebars in standing attacks.

Suspension: WP’s Off-Road Masterclass

• Front: The 48 mm WP USD fork (300 mm/11.8 in travel) offers adjustable compression/rebound. Stock settings are plush over roots and small rocks but resist bottoming on big hits.
• Rear: The WP PDS monoshock (335 mm/13.2 in travel) uses a progressive damping system (PDS) that eliminates linkage maintenance. It’s brilliant for technical terrain, though faster riders might crave more mid-stroke support.

Brakes: Strong Front, Forgetful Rear

Brembo supplies the hardware, but the 260 mm front disc (2-piston) and 220 mm rear (1-piston) are a tale of two ends. The front offers strong, progressive bite—ideal for late braking into corners. The rear? It’s there. Expect vague feedback and a wooden lever feel; many owners upgrade to a larger rotor or braided line.

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Competition: How the 300 EXC Stacks Up

In the 300cc enduro class, the KTM 300 EXC faced fierce rivals. Here’s how it measured up:

Husqvarna WR300 (2008–2011)

• Engine: Similar 293cc two-stroke, but with a Dell’Orto carburetor. Less tunable than the Keihin, but smoother power delivery.
• Handling: Softer suspension and a steel frame made it feel plusher but less precise in technical sections.
• Verdict: A gentler option for trail riders, but the KTM ruled hare scrambles.

GasGas EC300

• Engine: More aggressive powerband with a hit that demanded clutch finesse.
• Ergonomics: Narrower seat and lower peg position suited shorter riders.
• Verdict: Loved by trials crossover riders, but lacked KTM’s parts availability.

Yamaha WR250F (Four-Stroke)

• Engine: 250cc four-stroke with linear power—no match for the KTM’s torque.
• Weight: 113 kg (249 lbs) wet felt portly compared to the 300 EXC.
• Verdict: Better for dual-sport use, but outgunned off-road.

KTM’s Edge: Adjustable power characteristics, class-leading weight, and WP suspension made it the choice for riders who valued versatility.

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Maintenance: Keeping the Torque Alive

The 300 EXC is famously low-maintenance, but a few key areas demand attention:

1. Premix Wisdom

• Run a 60:1 fuel/oil ratio with high-quality synthetic oil (e.g., Motorex Cross Power 2T).
• Pro Tip: Install an inline fuel filter to protect the carburetor from debris.

2. Air Filter Care

• Clean every 10–15 hours using biodegradable solvent.
• Upgrade to a Twin Air filter with a pre-filter skin for dusty conditions.

3. Suspension TLC

• Replace fork oil every 50 hours.
• Check PDS shock nitrogen pressure annually (140 psi/9.6 bar).

4. Carburetor Jetting

• Stock jetting works for sea-level to 1,000 m (3,280 ft). For higher elevations, drop the main jet 2–3 sizes.

5. Brake Upgrades

• MOTOPARTS.store recommends a Tusk 260 mm rear rotor kit for better stopping power.

6. Exhaust Valve Maintenance

• Clean the TVC (exhaust power valve) every 30 hours to prevent carbon buildup.

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Conclusion: The Last Great Two-Stroke?

The 2008–2011 KTM 300 EXC is a time capsule of two-stroke excellence—a bike that rewards skill with relentless torque and forgives mistakes with agile handling. It’s not perfect (looking at you, rear brake), but its flaws are overshadowed by sheer capability. Whether you’re resurrecting a barn find or upgrading a well-loved example, MOTOPARTS.store has the parts to keep this legend alive. From CNC brake levers to gripper seat covers, we’ve got your back—because the best enduro bikes aren’t just ridden; they’re inherited.

Ready to unleash your 300 EXC’s potential? Explore our curated selection of upgrades and OEM replacements at MOTOPARTS.store.

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Specifications sheet

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