KTM 300 EXC [2012-2016]: The Two-Stroke Enduro Legend Reimagined

Introduction

The KTM 300 EXC isn’t just a motorcycle—it’s a rite of passage for hardcore enduro riders. Between 2012 and 2016, this Austrian beast solidified its reputation as the ultimate off-road weapon, blending the raw aggression of a two-stroke engine with refinements that made it shockingly rideable. Whether you’re slicing through tight singletrack, clawing up rocky inclines, or blasting across open fire roads, the 300 EXC feels less like a machine and more like an extension of your instincts. After spending days thrashing a well-maintained 2014 model through everything from mud bogs to technical hill climbs, it’s clear why this generation remains a benchmark for enduro performance.

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Engine Performance: The Heart of a Predator

At the core of the KTM 300 EXC lies its 293cc liquid-cooled two-stroke engine—a masterpiece of controlled fury. The square 72mm bore and stroke create a uniquely broad powerband, delivering arm-straightening torque from idle to midrange while still screaming into the upper revs when you crack the throttle. Unlike older two-strokes that demanded constant clutch work, this engine’s reed-valve intake and exhaust power valve system (standard across this generation) smooth out the hit, making it manageable in technical sections yet explosively fun when you want it.

The Keihin PWK 36mm carburetor (used throughout this generation) provides crisp throttle response. While fuel-injected competitors emerged later, the carbureted setup here is dead reliable and easily tunable for altitude or riding style. The hydraulic-actuated DDS clutch (introduced in later model years) is a revelation—light pull, minimal fade, and perfect modulation for technical climbs or aggressive downshifts.

Key highlights:
- 6-speed transmission: The wide-ratio gearbox lets you crawl at walking speeds in first gear or hit 100+ km/h (62+ mph) on open trails.
- Electric start: A lifesaver in rocky terrain or after a stall on a hillside (though the kickstarter backup is reassuring).
- Oil injection: Later models included pre-mix oil tanks, simplifying fuel prep (though purists may still prefer manual mixing).

Riding this bike feels like having a cheat code. It’ll tractor up hills in third gear, then explode into a wheelie with a flick of the wrist. The exhaust note—a crisp, ringing bark—is pure two-stroke adrenaline.

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Chassis and Handling: Precision Meets Brutality

KTM’s chromoly steel central-tube frame is the backbone of the 300 EXC’s legendary handling. Weighing just 102-104 kg (225-229 lbs) dry, this bike changes direction like a mountain bike yet feels planted at speed. The 1,482 mm (58.3-inch) wheelbase and 26.5° rake strike a perfect balance between stability and agility. Throw it into a rutted corner, and the chassis communicates every pebble through the handlebars, yet it never feels twitchy on high-speed straights.

The 21-inch front and 18-inch rear spoked wheels (shod with 90/90-21 and 140/80-18 tires, respectively) eat up roots and rocks while providing predictable slide control in loose terrain. Ground clearance of 355 mm (14 inches) ensures you’ll rarely drag the frame over logs or boulders.

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Suspension and Brakes: WP’s Off-Road Mastery

KTM’s partnership with WP Suspension shines here. The 48mm USD forks offer 300 mm (11.8 inches) of travel, adjustable for compression and rebound. Out back, the PDS (Progressive Damping System) shock serves up 335 mm (13.2 inches) of wheel travel without the complexity of a linkage system. Setup is critical—stock settings lean toward plushness for trail riders, but aggressive racers will want to stiffen compression for big hits.

Braking is handled by single 260mm front and 220mm rear discs. While not as powerful as motocross setups, the Brembo-derived calipers (on floating bearings in later years) provide precise modulation—essential for slippery descents.

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Ergonomics and Comfort: Built for War, Designed for Endurance

At 960 mm (37.8 inches), the seat height is intimidating for shorter riders but pays dividends in deep ruts or off-camber sections. The narrow midsection lets you grip the bike with your knees, while the handlebar bend (adjustable via four positions) accommodates both seated and standing attacks. Fuel capacity of 9.5 liters (2.51 gallons) seems small but delivers 100+ km (62+ mile) range thanks to the efficient two-stroke.

The 2016 model’s LCD dash added a modern touch with hourmeter and trip computer—useful for endurance events. Vibrations are minimal for a single-cylinder, though your hands will still tingle after hours of hard riding.

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Competition: How the 300 EXC Stacks Up

The 300cc enduro class is fiercely contested. Here’s how the KTM fares:

• Husqvarna TE 300: Sharing much of KTM’s DNA post-2013, the TE 300 counters with a linked rear suspension and slightly softer power delivery. Ideal for riders who prioritize plushness over razor-sharp feedback.
• Beta 300 RR: Beta’s oil-injected motor and lower seat height (935 mm / 36.8 inches) appeal to technical trail riders, but it lacks the KTM’s explosive top-end.
• Yamaha YZ250X: A motocross-derived beast with stellar suspension, but no electric start and a narrower powerband. Purists love it; everyone else misses the KTM’s versatility.

The 300 EXC’s blend of power, weight, and adjustability makes it the default choice for riders who want one bike to rule every terrain.

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Maintenance: Keeping the Orange Beast Alive

Two-strokes live and die by their maintenance—neglect this bike, and it’ll bite back. Here’s your survival guide:

1. Premix Wisdom: Later models with oil injection require less hassle, but always check the oil pump cable. For pre-mix, stick to 60:1 ratios with quality synthetic oil.
2. Air Filter Love: Clean the foam filter after every ride. Consider a twin-air filter kit ($34.99 at MOTOPARTS.store) for quicker swaps.
3. Piston Life: Replace the piston every 80-100 hours. The Vertex piston kit ($189.99) is a popular upgrade.
4. Suspension Service: Rebuild WP forks/shock annually. MOTOPARTS.store stocks OEM seal kits ($59.99).
5. Brake Care: Swap pads before they’re metal-on-metal. Galfer wave rotors ($129.99) improve bite in mud.
6. Cooling System: Use Engine Ice coolant and check rad hoses for wear.

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Conclusion: Why This Generation Still Matters

The 2012-2016 KTM 300 EXC isn’t just a relic—it’s a living legend. Its combination of brutal power, featherweight agility, and bulletproof reliability makes it a favorite among enduro racers and trail riders alike. While newer models flirt with fuel injection and TPI, this carbureted generation remains a golden era for riders who love simplicity and tunability.

Whether you’re resurrecting a barn find or upgrading a well-loved example, MOTOPARTS.store has the OEM and aftermarket parts to keep your 300 EXC shredding for another decade. From clutch kits to carbon pipe guards, we’ve got your back—because legends deserve immortality.

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Specifications sheet

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