The Timeless Trials Machine: Living With The GAS GAS TXT 250 (2002-2014)

Introduction

For over a decade, the GAS GAS TXT 250 stood as a benchmark in the trials motorcycle world - a nimble, fiery-tempered Spaniard that redefined what riders expected from precision off-road machinery. While modern electric trials bikes grab headlines today, there’s still nothing quite like wrestling a well-tuned two-stroke TXT through a rock garden. Having recently spent time with a meticulously maintained 2012 TXT Pro 250, I’m here to explain why this generation remains relevant to riders and why its legacy matters when shopping for parts today.

Engine Character: Two-Stroke Soul

At the heart (and lungs) of every TXT 250 beats an air-cooled 247.7cc single-cylinder two-stroke engine. This isn’t some detuned enduro motor - it’s a purpose-built trials powerplant delivering explosive low-end torque the moment you crack the Dell’Orto PHBL26BS carburetor open.

The magic lies in its simplicity: - 72.5mm bore x 60mm stroke (2.9” x 2.4”) creates instant throttle response - Liquid cooling keeps temps stable during slow technical sections - 6-speed transmission (ratios tighter than a drumline)
- 1:50 oil/fuel mix (2% oil) lubrication system

What surprised me most was the engine’s tractability. While two-strokes are notoriously peaky, the TXT’s power valve system delivers a shockingly smooth transition from idle to scream. You can lug it at walking pace over logs, then fan the clutch for a burst to clear a 4-foot vertical face. The distinctive “braaaap” echoes off trial walls with an addictive intensity missing in four-strokes.

Chassis Dynamics: Lightness as Religion

Hoisting the TXT 250 off its stand reveals its party trick - a dry weight of just 66-68kg (145-150 lbs). That’s 20kg lighter than most enduro bikes! The secret lies in its chrome-molybdenum tubular frame - a triangulated work of art that’s both stiff and forgiving. Combined with the narrow 825mm (32.5”) width, it disappears between your knees the moment you stand up.

Key geometry highlights: - Wheelbase: 1330-1340mm (52.4-52.8”) for tight pivots - Seat height: 650-665mm (25.6-26.2”) - more of a perch than a seat - Ground clearance: 300mm+ (11.8”) thanks to upswept exhaust

Suspension Setup: Controlled Chaos

GAS GAS didn’t cut corners here. Earlier models used Marzocchi 38-40mm forks with adjustable compression/rebound - overkill for trials but perfect for swallowing misjudged drops. By 2012, the Pro models featured 177mm (7”) of front travel via Marzocchi’s Right-Side-Up forks, paired with Sachs or Öhlins rear shocks offering 164mm (6.5”) travel.

The beauty is in the tuning: - Forks stiff enough to prevent dive during abrupt stops - Progressive rear linkage that firms up as you approach bottom-out - Easily adjustable preload for rider weight (critical given the 66kg bike weight)

Braking: Surgical Precision

Single discs front and rear (220mm front/190mm rear on later models) might seem understated until you feel the bite. The 4-piston front caliper (2-piston rear) offers modulation that’s: - Feather-light for balance points - Instantly aggressive when you need anchor-like stopping

Upgrading to sintered pads (available at MOTOPARTS.store) transforms these from good to sublime in muddy conditions.

Competition: How It Stacks Up

The TXT 250’s prime rivals were/are:

1. Beta Evo 250 (2005-Present)
- Similar weight (67kg/148lbs)
- Softer power delivery
- More beginner-friendly
- Less aggressive chassis geometry

2. Sherco ST 250 (2008-Present)
- French counterpart with 2T/4T options
- Newer designs have better ergonomics
- Historically pricier parts

3. Montesa Cota 4RT260 (2005-Present)
- 4-stroke Honda engine
- Heavier (74kg/163lbs) but ultra-smooth
- Fuel injection vs. TXT’s carburetor

Where TXT Excels:
- Immediate throttle response
- Class-leading suspension components (Marzocchi/Sachs vs. Beta’s Sachs/Sachs)
- Aftermarket support (ours included!) for customization

Maintenance: Keeping the Spaniard Sharp

Owning a TXT 250 isn’t just riding - it’s a relationship. Here’s how to keep it healthy:

Engine Care
- Premix Religiously: 1:50 ratio (2% oil). Use high-quality synthetic like Motul 710
- Carb TLC: Clean Dell’Orto jets monthly. Consider a JD Jet Kit for altitude changes
- Cooling System: Replace coolant annually. Watch for radiator fin damage

Clutch & Transmission
- Hydraulic Fluid: Bleed clutch (Mineral Oil DOT 4) every 60 hours
- Plates: Upgrade to Barnett Kevlar plates (quieter engagement)

Suspension
- Fork Seals: Replace every 100 hours or when leaking
- Linkage Bearings: Grease every 40 hours (Pivot Works kits available)

Our Top Upgrade Picks from MOTOPARTS.store:
- Twin Air Filter + Prefilter (fits ’02-’14)
- BRAKING Wave Rotor Kit (improved mud clearance)
- Hebo CNC Footpegs (wider platform)
- AXP Skid Plate (5mm polyethylene)

Living With a Legend

A week with the TXT 250 reveals why it dominated trials for 12 years. The way it flicks between rocks feels telepathic - a combination of that 66kg weight and the hyper-responsive motor. Standing on the pegs, you’re not just riding a bike; you’re wearing it. The lack of a seat (let’s be honest - that 650mm “seat” is a formality) forces proper trials technique, which in turn makes you a better rider.

Yet it’s not without quirks. The kickstarter requires a committed swing, the carburetor demands jetting adjustments with weather changes, and the plastic subframe reminds you that this is a competition tool first. But these aren’t flaws - they’re character traits in a machine that’s still winning events in grizzled veteran hands.

Conclusion: Why It Still Matters

In an era of fuel-injected four-strokes, the GAS GAS TXT 250 remains a masterclass in mechanical simplicity. Its longevity (2002-2014) means parts are plentiful, and its aftermarket ecosystem is thriving. Whether you’re hunting for OEM replacements or performance upgrades, platforms like MOTOPARTS.store keep these fiery Spaniards alive and kicking - literally.

Final thought? The TXT 250 isn’t just a motorcycle; it’s a tutor. Ride one for a season, and every other bike in your garage will feel easier. Neglect your maintenance, and it’ll humble you. But get it right, and there’s no terrain you can’t dance across.

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Specifications sheet

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