Gas Gas Ec 300
The Gas Gas Ec 300 has a top speed of ~130 km/h (estimated; not optimized for top speed — note: off-road focused), produces ~48–52 hp and weighs 98 kg. Motoryk rates it 8/10.
The GAS GAS EC 300 is a two-stroke enduro motorcycle that traces its roots to the Spanish manufacturer GAS GAS, founded in 1985 in Salt, Catalonia. The EC (Enduro Competition) 300 became a flagship model in their enduro lineup, renowned for its powerful 300cc two-stroke engine and competitive off-road capability. After KTM Group acquired GAS GAS in 2019, the EC 300 was modernized with updated chassis and engine components shared with the KTM/Husqvarna platform, cementing its reputation as one of the premier two-stroke enduro bikes on the market.
~48–52 hp
Power
~45 Nm
Torque
98 kg
Weight
~130 km/h (estimated; not optimized for top speed — note: off-road focused)
Top Speed
3.5–5.0 L/100km (estimated real-world; varies heavily with terrain and riding style)
Fuel
Naked
Body
Video Review
What Buyers Should Know
KTM-Shared Platform
The GAS GAS EC 300 shares its engine and chassis platform with the KTM EXC 300, meaning parts availability is excellent and mechanics familiar with KTM can easily service it. This significantly reduces ownership headaches compared to more obscure brands.
Watch the Reeds
A common issue to inspect is the reed valve petals, which can crack or wear with aggressive riding and cause noticeable power loss. Checking reed condition before purchase is a simple but important pre-buy inspection step.
Strong Resale Value
GAS GAS EC 300s hold their value reasonably well due to the KTM connection and strong demand in the enduro market. Well-maintained examples typically depreciate slower than comparable off-brand two-strokes.
Generations & Specs by Year
Original Spanish-era two-stroke enduro, Paioli or Marzocchi forks, cast frame, Jlo or Hiro engine variants.
"Raw Spanish fire that rewards the brave and punishes laziness."
The EC 300 from this era is a proper handful — 48 horses in a 98kg chassis with no electronic safety net means you either learn to ride or you get thrown. The Paioli forks are soft by modern standards and dive badly under hard braking, but the cast frame communicates feedback through every trail like a telegraph wire, and once you trust it, you can thread lines that heavier bikes can't touch. The Jlo-era engines are finnicky about jetting — temperature and altitude will have you pulling the carb apart trailside if you're not paying attention — but when it's dialed, that two-stroke hit is addictive in a way no fuel-injected 300 has ever replicated. Sourcing parts outside of Spain was genuinely difficult through most of the 2000s, and finding someone who actually knows these early cast-frame bikes still is half the battle of ownership.
Pros
Cons
Revised chromoly frame, Marzocchi or WP forks, updated Pavesi-era engine, improved power delivery and ergonomics.
"The wildest 300 two-stroke you could legally trail ride."
The Gen 2 EC 300 hit a sweet spot Gas Gas had been chasing since the mid-90s — the revised frame actually tracked straight through rocky Catalan singletrack instead of hunting around like the early bikes. Pavesi-era engine tuning cleaned up the hit considerably; it still kicks hard mid-range but you're not white-knuckling every roll-on the way you were with the Gen 1. My WP-forked example was noticeably plusher than friends' Marzocchi versions on long rocky descents, though both felt genuinely capable at a level that shamed much pricier Japanese hardware. The weak points are real though: electrics are a joke, the Domino throttle cable routing is a disaster waiting to happen on tight switchbacks, and if you don't re-torque the pipe-to-head connection every few rides you will be chasing an exhaust leak across a Spanish hillside.
Pros
Cons
Torrot/Aspar ownership era, lighter frame, updated WP suspension, Kokusan ignition, refined two-stroke engine.
KTM partnership influence, new aluminum frame, WP XACT suspension, updated Minarelli-derived engine, modern ergonomics.
Full PIERER Mobility ownership, KTM-derived platform, new frame and bodywork, updated WP suspension, fuel-injected option introduced.
Used Buyer Review
"A ferocious enduro tool that rewards experienced, disciplined ownership only."
$4,500-$7,500 usedThe EC 300 is a proper weapon if you know what you're getting into. That two-stroke 300cc motor is genuinely savage — it'll launch you into trouble faster than you can think about it, and the power delivery is sharp enough to keep you honest on every ride. For tight technical enduro work or aggressive trail riding, nothing at this price point comes close. GasGas sorted out a lot of the earlier KTM-era teething issues by 2021, so the platform is reasonably solid now. Used examples have a rough life expectancy though. These bikes get flogged hard. Check the reed valves, inspect the expansion chamber for dents and rust, and pull the powervalve cover — if it's never been cleaned you'll find a graveyard of carbon deposits. Top end rebuilds are cheap enough on two-strokes but skipped maintenance is the real killer here. Ask for service history and if the seller laughs at you, walk away.
Top 10 Accessories
Curated picks for the Gas Gas Ec 300 — owned, ridden, recommended.
Common Problems
🔥 2 CRITICALRemove and inspect PV for carbon buildup and movement
Check for crank wobble and listen for rod knock
Inspect weep hole under pump for coolant residue
Remove airbox and visually inspect reed petals for damage
✅Pre-Purchase Checklist
Strong engine, maintenance-dependent, inspect thoroughly before buying
Full Specifications
Rivals & Alternatives
Bikes that buyers cross-shop with the Gas Gas Ec 300
Ktm 300 Exc Tpi
Husqvarna Te 300
Husqvarna Tx 300i
Swm Rs 300r
Sherco Se 300i
Compare Gas Gas Ec 300 Side-by-Side
compare_arrowsSpecs, power, weight & buyer verdict — head-to-head with the bikes most often cross-shopped.
Gas Gas Ec 300 vs Ktm 300 Exc Tpi
Specs · Power · Buyer verdict
Gas Gas Ec 300 vs Husqvarna Te 300
Specs · Power · Buyer verdict
Gas Gas Ec 300 vs Husqvarna Tx 300i
Specs · Power · Buyer verdict
Gas Gas Ec 300 vs Swm Rs 300r
Specs · Power · Buyer verdict
Gas Gas Ec 300 vs Sherco Se 300i
Specs · Power · Buyer verdict
More Gas Gas Ec 300 Guides
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Discussion
Frequently Asked Questions
What are common problems with the Gas Gas Ec 300? +
Power valve seizure from neglected maintenance: Remove and inspect PV for carbon buildup and movement (serious) | Crankshaft bearing wear from low hours abuse: Check for crank wobble and listen for rod knock (serious) | Coolant leaks from water pump seals: Inspect weep hole under pump for coolant residue (moderate)
Is the Gas Gas Ec 300 a good motorcycle? +
A ferocious enduro tool that rewards experienced, disciplined ownership only. Rating: 8.0/10. Best for: Experienced enduro riders wanting two-stroke intensity. Avoid if: Beginners or riders skipping regular maintenance.
What is the horsepower of the Gas Gas Ec 300? +
The Gas Gas Ec 300 produces ~48–52 hp @ 8,500 rpm (estimated; manufacturer does not officially publish output figures), with ~45 Nm @ 7,000 rpm (estimated; manufacturer does not officially publish figures) of torque. Top speed: ~130 km/h (estimated; not optimized for top speed — note: off-road focused).
Is the Gas Gas Ec 300 good for beginners? +
Yes — the Gas Gas Ec 300 is a reasonable choice for new riders (48 hp is manageable), weighing 98 kg. Experienced enduro riders wanting two-stroke intensity
Is the Gas Gas Ec 300 reliable? +
Owners report 2 critical issues to watch for on the Gas Gas Ec 300, notably: Power valve seizure from neglected maintenance (Remove and inspect PV for carbon buildup and movement). Buy with a pre-purchase inspection.
Is the Gas Gas Ec 300 good for daily use? +
Experienced enduro riders wanting two-stroke intensity Fuel: 3.5–5.0 L/100km (estimated real-world; varies heavily with terrain and riding style).
How fast is the Gas Gas Ec 300? +
The Gas Gas Ec 300 reaches a top speed of ~130 km/h (estimated; not optimized for top speed — note: off-road focused), producing 48 hp at 98 kg curb weight. Real-world performance depends on rider weight, gearing, and road conditions.
What gear should I buy for a Gas Gas Ec 300? +
Motoryk has curated a Top 10 gear list specifically for the Gas Gas Ec 300, covering engine oil, tires, chain, battery, and brake pads — see motoryk.com/bikes/gas-gas/ec-300/top10. Each pick is matched to this bike's spec.
