GAS GAS TXT 250 [2015 - 2022] Review: A Trial Bike That Rewrites the Rules

Introduction

The GAS GAS TXT 250 isn’t just a motorcycle—it’s a declaration of intent. Born in Spain’s rugged terrain and refined over generations, this trial bike has earned its stripes as a weapon for technical riders who demand precision, agility, and unshakable reliability. From 2015 to 2022, the TXT 250 maintained a cult-like following among hardcore trial enthusiasts, and after spending time with this machine, it’s easy to see why. Let’s dive into what makes this two-stroke legend tick—and why it still turns heads in the competitive trial scene.

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Engine Performance: Raw Power Meets Surgical Precision

At the heart of the TXT 250 lies a 247.7cc liquid-cooled two-stroke engine—a configuration that’s become increasingly rare in modern motorcycling. This isn’t your grandfather’s smoky two-stroke, though. The reed-valve induction system and Keihin PWK 28 carburetor (or fuel injection in later models) deliver crisp throttle response that feels telepathic when navigating rocky inclines or balancing on precarious ledges.

The 72.5mm x 60mm bore/stroke ratio creates a broad powerband, with enough low-end torque to crawl over obstacles and a satisfying mid-range punch for controlled hops. Riders accustomed to four-strokes will notice the immediate hit of acceleration—it’s not brutal, but it demands respect. The hydraulic diaphragm clutch (BRAKTEC or GG 1/3 depending on year) provides featherlight modulation, essential for technical sections where millimeter-perfect control matters more than outright speed.

Fueling varies between carbureted and injected models. The carbureted versions (2015-2020) offer that classic two-stroke "zing" and easy field tuning, while the 2021-2022 fuel-injected models trade some of that rawness for cleaner emissions and consistent performance at altitude. Both setups run on a 1:50 premix ratio—a small price to pay for the simplicity of oil-in-fuel lubrication.

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Chassis & Suspension: Lightness as a Religion

The TXT 250’s chromoly tubular frame is a masterclass in minimalist design. At just 67-69 kg (148-153 lbs) dry, it feels more like a mountain bike than a motorcycle when shouldering through impossible sections. The 1,320mm (52-inch) wheelbase and 325mm (12.8-inch) ground clearance create a perfect balance between stability and maneuverability.

Suspension components evolved slightly across generations but stayed true to the trial ethos: - Front: TECH or Race Tech forks with 39mm aluminum sliders (167-180mm/6.6-7.1in travel)
- Rear: REIGER or Öhlins shocks with linkage systems (164-174mm/6.5-6.9in travel)

Even base models feature adjustable compression/rebound damping—a rarity in this class. The setup prioritizes slow-speed compliance over big-hit absorption, making it ideal for methodical climbs rather than all-out desert racing.

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Brakes & Wheels: Controlled Aggression

BRAKTEC dominates the braking system with its signature combination of power and modulation: - Front: 4-piston monobloc caliper biting a NG WAVE floating disc
- Rear: 2-piston caliper with autostand system for hill holds

The 21-inch front/18-inch wheel combo wrapped in Michelin Trial X11 or similar rubber provides tenacious grip on everything from wet tree roots to loose shale. The spoked aluminum rims (520 chain compatible) strike a perfect balance between durability and weight savings.

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Ergonomics: Built for the Battlefield

At 630-650mm (24.8-25.6 inches), the seat height is deceptively tall but necessary for proper leg extension during technical maneuvers. The narrow profile between the knees makes it easy to clamp the bike with your boots when pivoting on the pegs. Controls are minimalist—no unnecessary switches or gauges—with a focus on immediate access to clutch and brake levers.

Fuel capacity ranges from 2.4-3.5 liters (0.63-0.92 gallons), which sounds minuscule until you realize most trial events rarely exceed 40 km (25 miles). The lack of a fuel gauge keeps you focused on riding rather than dashboard-watching.

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Competition: How It Stacks Up

The TXT 250’s fiercest rivals include:

1. Beta Evo 250
2. Similar weight but with a slightly softer power delivery
3. Sacrifices brake feel for a plusher suspension setup

4. Aftermarket parts network not as robust as GAS GAS

5. Sherco ST 250

6. More beginner-friendly engine mapping
7. Heavier at 72 kg (159 lbs) dry

8. Higher seat height (660mm/26in)

9. Montesa Cota 4RT 260

10. Four-stroke engine (quieter but less responsive)
11. Honda reliability comes at a 10-15% price premium
12. 5kg (11 lbs) heavier than the TXT 250

The GAS GAS distinguishes itself with its razor-sharp hydraulic clutch and class-leading weight distribution—traits that matter most in championship-level sections.

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Maintenance: Keeping the Beast Alive

As MOTOPARTS.store’s in-house trial specialist, here’s my maintenance cheat sheet:

1. Two-Stroke Oil: Stick to the 1:50 premix ratio. We recommend MOTOPARTS Synthetic Trial Oil for its low-smoke formulation.
2. Chain Care: The 520 chain needs regular lubrication. Our X-Ring kits reduce maintenance intervals by 40%.
3. Brake Upgrades: Swap stock pads for MOTOPARTS Sintered Metal pads to prevent fade during long events.
4. Suspension Tuning: Rebuild kits with low-friction seals transform mid-generation TXT 250 suspensions.
5. Carburetor Kits: JD Jet Kits (available at MOTOPARTS.store) solve altitude-related fueling issues in pre-2021 models.

Common wear items include brake rotors, footpeg teeth, and exhaust mounts—all readily available in our catalog.

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Conclusion: Timeless Trial Mastery

The GAS GAS TXT 250 isn’t just a relic of the two-stroke era—it’s a living testament to trial purity. While newer bikes chase electronic gimmicks, the TXT 250 remains blissfully analog, demanding skill rather than compensating with tech. Whether you’re tackling a national championship or backyard rock garden, this Spanish marvel delivers a riding experience that’s equal parts punishing and poetic.

At MOTOPARTS.store, we keep your TXT 250 running like new with upgrades that enhance durability without diluting its raw character. From BRAKTEC brake kits to Öhlins shock rebuilds, we’ve got the parts to make your GAS GAS outlast the competition.

Ready to dominate the section? Your TXT 250 deserves the best—shop performance upgrades now.

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Specifications sheet

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