GAS GAS MC 250 2T (1998-2009): A Motocross Legend Revisited

Introduction

When you think of European two-stroke dominance in motocross, names like KTM and Husqvarna might come to mind. But between 1998 and 2009, Spain’s GAS GAS carved its own legacy with the MC 250 2T – a bike that combined race-ready aggression with surprising refinement. After throwing a leg over a well-preserved 2007 model, it’s clear this machine wasn’t just a contender; it was a statement.

The moment you approach the MC 250, its purposeful stance grabs attention. The signature red/black/white livery (post-2004 models) screams Spanish passion, while the compact Deltabox frame hints at precision engineering. At 99.5 kg (219 lbs), it feels almost disrespectfully light compared to modern four-strokes. Let’s dissect why this two-stroke warrior still makes riders’ hearts race.

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Engine Performance: Two-Stroke Thunder

The heart of the beast: 249cc liquid-cooled two-stroke

Fire up the kickstarter (there’s no electric leg here), and the 249cc single cylinder barks to life with that addictive two-stroke braap. The Keihin PWK 38mm carburetor delivers crisp throttle response across the rev range. What surprises first-time riders is the engine’s versatility:

• Low-end grunt: Unlike peaky 250cc two-strokes of the ‘90s, the MC 250 builds power from down low. The 66.4 x 72mm bore/stroke ratio gives it tractor-like pull out of corners. Need to short-shift? No problem – it’ll lug without fouling plugs.
• Mid-range punch: Where this engine truly shines. Crack the throttle open mid-corner, and the Kokusan digital CDI multispark ignition ensures clean combustion. There’s a linear surge rather than a light-switch hit, making it manageable on hardpack yet explosive enough for deep loam.
• Top-end scream: Rev it out to 8,500 RPM, and the expansion chamber wails like a MotoGP bike from hell. The over-rev is generous, letting you hold gears longer – crucial when attacking rhythm sections.

The hydraulic clutch (introduced in 2006 models) is a revelation. Lever pull is butter-smooth, even after hours of abuse, and engagement is precise. Paired with the 6-speed gearbox, you’re always in the meat of the powerband.

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Handling: Precision Meets Playfulness

Marzocchi forks and Öhlins shock – premium suspension setup

GAS GAS nailed the geometry here. The 1475mm (58.1") wheelbase strikes a perfect balance between stability at speed and flickable agility. Throw it into a rutted corner, and the Deltabox chromoly frame communicates every terrain nuance without harshness.

Key handling highlights:
- Suspension setup: The 50mm Marzocchi inverted forks (295mm travel) soak up braking bumps like a sponge, while the Öhlins rear shock (310-320mm travel) keeps the rear planted on exit. Compared to Japanese competitors’ stock setups, this feels like factory-tier equipment.
- Ergonomics: At 940mm (37"), the seat height is accessible for shorter riders, but the narrow chassis lets taller pilots (like this 6’1" tester) move freely. The handlebar bend feels natural when attacking whoops or negotiating tight woods.
- Braking: The single 220mm discs (front/rear) lack initial bite compared to modern 4-piston calipers but offer progressive feel. Swap to sintered pads (available at MOTOPARTS.store) for sharper response.

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Competition: How It Stacks Up

The MC 250 2T faced fierce rivals in its era. Here’s how it measures up:

1. KTM 250 SX (2000-2009):
2. More aggressive powerband with harder hit
3. Lighter chassis but harsher suspension

4. Verdict: KTM for pure aggression, GAS GAS for technical precision

5. Yamaha YZ250 (1999-2009):

6. Legendary reliability but heavier (107kg vs 99.5kg)
7. Softer suspension for amateur riders

8. Verdict: YZ250 for weekend warriors, MC 250 for serious racers

9. Husqvarna WR250 (2004-2008):

10. Broader power delivery but dated chassis
11. Higher seat height (960mm vs 940mm)
12. Verdict: Husky for enduro, GAS GAS for MX dominance

Where the MC 250 truly excels is suspension sophistication. While others required revalving for pro-level use, the Öhlins/Marzocchi combo worked straight out of the crate.

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Maintenance: Keeping the Beast Alive

Pro tip: Regular piston swaps keep two-strokes happy

The MC 250 is relatively low-maintenance if you follow these guidelines:

1. Engine Care:
2. Piston replacement: Every 40-50 hours for racers, 80hrs for casual riders
3. Carb tuning: Clean the Keihin PWK every 20hrs; consider upgrading to a JD Jet Kit (available here) for altitude adjustments

4. Cooling system: Flush coolant annually – these engines run hot during hard motos

5. Suspension:

6. Change fork oil every 100hrs

7. Rebuild Öhlins shock every 2 seasons

8. Upgrades Worth Considering:

9. VForce3 Reed Valve: Sharpens throttle response
10. Titanium exhaust: Sheds weight and boosts mid-range
11. Wave brake rotors: Improves stopping power without major mods

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Conclusion: Timeless Two-Stroke Thrills

The MC 250 2T – still a weapon in skilled hands

Riding the GAS GAS MC 250 2T is like wielding a scalpel – precise, sharp, and brutally effective. While modern four-strokes dominate today, this Spanish stallion reminds us why two-strokes ruled the golden era of motocross. Its combination of tractable power, sublime suspension, and featherweight chassis makes it a perfect project bike for vintage MX rebuilds or a trusty steed for local harescrambles.

Whether you’re refreshing an old warrior or pushing a well-maintained example to its limits, MOTOPARTS.store has the OEM and performance parts to keep your MC 250 shredding for another decade. Now go mix that 40:1 fuel and let the braap echo through the woods!

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Specifications sheet

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