The roots of the brand

TXT GP 125

TXT GP 125

Base Price: 7,960.00 EUR*
Base Price: 7,960.00 EUR*

The GASGAS TXT GP 125 is the perfect bike for aspiring riders to develop their skills. With a lightweight construction and easy to manage character, our smallest 2-stroke trial bike allows youngsters to have fun while building their confidence. With class leading suspension, selectable engine maps and Braktec hydraulic clutch and brakes, the TXT GP 125 features a collection of top components and upgrades over the TXT GP RACING 125, ensuring quality, reliability and incredible performance. With smooth, revvy power the 125cc motor has a flat and continuous torque curve, ideal for helping riders find grip while pushing deeper into the exciting world of trial riding.

Features & Benefits




Minimalist. Lightweight. Durable. We love our bikes’ distinctive, modern and super-slim look. The bodywork of all GASGAS TXT GP trial bikes ensures riders feel comfortable and confident during every ride. And because no rider goes more than a few weekends without a fall, we use Polypropylene when injection molding our plastics, which doesn’t mark when bent more than 90 degrees. All front mudguards feature an integrated fork brace.

Carbon fiber airbox

A piece of art and an industrial design masterpiece! The carbon fiber airbox fitted to the TXT GP line-up ensures maximum airflow and the best filter protection. Featuring a clever, patented design, the airbox is a structural part of each bike yet feature no additional sub-assemblies. The Twin Air filter is easily accessed and can be removed by taking out just one bolt.   

Exclusive CTG Factory Graphics

Finishing the look of our TXT GP models, a set of factory graphics gives each bike a clean, distinctive appearance.

Renthal handlebars and grips

When you push the limits you make mistakes, which is why the TXT GP line-up is fitted with tapered Renthal handlebars – the best in the business when it comes to strong dependable ‘bars. Finished with a central protective pad, Renthal grips ensure riders get the very best hold of their TXT GP bike.

Fuel tank and carburetor

Fully integrated into both the frame and bodywork, our 2.3-liter fuel tank is so compact it almost doesn’t exist! Featuring a simple removal system, it feeds the Keihin PWK 28mm carburetor that in turn ensures all 2-stroke motors receive the fuel they need to deliver a wide spread of smooth, strong power. A J.Juan throttle cable ensures quick and easy adjustment.

Features & Benefits




Just like the TXT Racing models, we build our TXT GP frames to be super strong, using tubular, 1.5mm 25CrMo4 chrome-moly steel! They ensure precise rider feedback, deliver highly effective energy absorption as well as long-lasting durability, thanks to the fact they’re robot cut and laser welded. Weighing just 6kg, all frames ensure precision and toughness and are finished with a robust red powder coating and a unique special edition plate with serial number.


Red (we like red!) CNC machined triple clamps help deliver a super stable front-end on all TXT GP models, and look great, too. Aiding overall handling and ensuring perfect fitting of the front forks, the 35mm offset clamps are made from the highest quality aluminum for ultimate reliability and minimal weight.

Golden TECH forks

Similar to the TECH forks fitted to our TXT Racing models, just a little better… and golden! The 39mm Golden TECH forks feature 167mm of travel to ensure the entire TXT GP range offers the very best handling. A low friction coating on the stanchion tubes, combined with progressive rate springs and hydraulic compression and rebound adjustment ensure an incredibly smooth and stable ride. A 160 gram aluminum front axle guarantee riders have absolute front wheel confidence.

REIGER 3-way hydraulic rear shock absorber

With the adjustability of compression and rebound damping as well as the spring preload the REIGER 3-way shock is one of the stand out features of all TXT GP models. Delivering serious performance, the REIGER shock ensures maximum traction, every time.


Ready to take those big rear wheel hits, our hollow, one-piece cast aluminum swingarms are both slim but also super solid. Developed together with our vastly experienced manufacturing partner, we've increased the already proven rigidity to ensure additional stiffness, reliability and perfect flex behavior.

Features & Benefits




The TXT GP 125 motor is designed to produce class-leading power while also playing a key role in ensuring the bike’s incredible handling. Powerful, light and as compact as it can be, we’ve squeezed a lot of user-friendly performance out of our smallest trial bike. Sharing much of the same architecture as our larger capacity GASGAS trial bikes, the TXT GP 125 motor packs a definite punch!


The little TXT GP 125 cylinder delivers high performance across the entire rev range. With specifically designed intake and exhaust ports, when used together with the high-performance forged piston it ensures the motor is the best in its class and produces both impressive torque and smooth power. A low weight, aluminum cylinder bracket is used to reduce engine vibrations while also assisting with chassis stiffness.


Beautiful to look at, extremely light and key to all TXT GP models delivering best-in-class power. Our titanium expansion chambers maximizes motor performance, ensure slimmer ergonomics and also aid overall handling. When fitted to a silencer that is configured to be exactly like those on our race team bikes, it creates a formidable exhaust system.


The lightest gearbox in any trial bike on the market and another patented GASGAS part! The 4/6 system allows riders to select from 6 gears when there are only 4 gears on the internal transmission shaft. Ensuring all TXT GP bikes are technologically advanced, they reduce weight and allow for super compact crankcases.


The magic at the center of the TXT GP 125 motor! Our engineers perfectly balance each and every crankshaft to ensure maximum inertia and deliver a 54.5mm stroke, allowing the motor to run freely and deliver instant power. To increase durability, we use a closed main bearing made by SKF. Due to its specific positioning with the motor the crankshaft also contributes to the bike’s awesome handling. A strong, lightweight connecting rod completes the crankshaft, which also drives the water pump impeller.


The super-compact crankcase design puts all major moving parts close to the bike's center of gravity for incredible handling. Making things even more compact, our engineers built the bike's hydraulic clutch master cylinder into the clutch cover. A central location pin and central seal are fitted to increase and improve the sealing of the two crankcases, which guarantees incredible strength and durability. The fact that they're made using a gravity casting process keeps weight to a minimum.


To ensure a perfect, progressive action each and every time, all TXT GP models are fitted with the GASGAS 1/3 compact hydraulic clutch, which consisting of 3 Kevlar friction plates, 2 steel plates and a Belleville spring system for a guaranteed perfect operation each and every time. Allowing riders to build revs and deliver exact amounts of power to the rear wheel, the reliable, high-quality system also guarantees even wear, near maintenance-free operation and perfect action on every ride and in all weathers.

Features & Benefits




Complete braking confidence with a sensitive and progressive feel. That’s what the Braktec braking systems fitted to all TXT GP models ensures. The front 4-piston caliper features a 185mm front waved disc by NG while the rear 2-piston caliper features a 150mm NG FIM disc. Both deliver impressive stopping power. The rear brake system features patented magnetic brake pads, which stay open when the wheel is removed. Pretty neat, right!

S3 forged steel Hard Rock pegs

Offering three different options, the adjustable, large platform Hard Rock pegs from S3 offer standard, forwards and backwards positioning options. Ensuring riders can fine-tune their bike depending on personal preference and riding conditions, they allow for a precise, individual set-up.


Cool running motors produce the best power, that’s why our TXT GP bikes use an aluminum radiator together with a 115mm electrical, and waterproof, fan, with a thermostat to ensures a stable and constant coolant temperature. Red, double-layered silicone cooling hoses complete the robust and effective cooling system.


We use a simple but effective recipe when making our trial wheels. Mix CNC machined hubs with lightweight spokes and zinc plated steel nipples and connect them to high-strength aluminum rims by Morad! The result is super strong wheels that ensure an ultimate combination of strength, performance and reliability. A super lightweight 160 gram aluminum front axle guarantees riders have absolute front wheel confidence.


Fitted as standard with a map switch that changes engine character according to rider preference, weather and terrain type, and an AC Alternator that delivers more energy for a better spark, the TXT GP ignition and electrical system also uses no battery. Both the Engine Control Unit (ECU) and ignition coil are specifically positioned to be well protected and out of sight. A 3.4 kilogram rotor helps ensure maximum motor torque.


Michelin’s super-light X11 tires connect all of our TXT GP bikes to the rocks, mud and obstacles beneath them. The best in the business, they feature super-pliable knobbles that together with low pressures offer exceptional grip.

Technical Details


  • Transmission 6-speed
  • Starter Kickstarter
  • Stroke 54.5 mm
  • Bore 54 mm
  • Clutch BRAKTEC hydraulics - diaphragm GG 1/3
  • Displacement 124.8 cm³
  • Design 1-cylinder, 2-stroke engine


  • Weight (without fuel) 65.3 kg
  • Tank capacity (approx.) 2.4 l
  • Front brake disc diameter 185 mm
  • Rear brake disc diameter 150 mm
  • Front brake Monoblock 4 pistons BRAKTEC caliper, NG WAVE floating
  • Rear brake BRAKTEC caliper, autostand system, 2 pistons NG (FIM)
  • Chain 520
  • Frame design Chrome-molybdenum steel tubular space frame, powder-coated
  • Front suspension TECH aluminium bar Ø 39
  • Ground clearance 325 mm
  • Rear suspension REIGER hydraulic shock absorber with linkage
  • Seat height 630 mm
  • Steering head angle 67 °
  • Suspension travel (front) 167 mm
  • Suspension travel (rear) 174 mm