2025 GAS GAS TXT Racing 125 Technical Analysis & Specification Breakdown
Engineered by GAS GAS for the trial motorcycle segment, the 2025 GAS GAS TXT Racing 125 pairs a 124.8 cc (7.6 cu in) liquid-cooled single cylinder, two-stroke architecture with road-focused gearing. Internal engine geometry specifies a bore and stroke of 54.0 x 54.5 mm (2.1 x 2.1 inches) with a 11.8:1 compression ratio.
On the scales, the TXT Racing 125 measures 66.7 kg (147 lbs) dry. Rider ergonomics and chassis geometry center around a 630 mm (24.8 in) seat height — giving shorter riders and urban commuters confident flat-foot reach at traffic stops, combined with a 1,320 mm (52 in) wheelbase engineered for quick, flickable steering geometry. The 2.4-liter (0.6 US gal) fuel tank supports practical everyday commuting and weekend road stints.
Within MotoLibrary's GAS GAS archive, this model family spans 6 indexed model years from 2014 to 2025, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
Standover Height
630 mm (24.8 in)
Engine
Displacement124.8 ccm (7.62 cubic inches)
Engine TypeSingle cylinder, two-stroke
Engine DetailsReed valve
Compression11.8:1
Bore x Stroke54.0 x 54.5 mm (2.1 x 2.1 inches)
Fuel SystemCarburettor. Keihin PWK 28
IgnitionHidria ECU
CoolingLiquid
Transmission
Gearbox6-speed
Final DriveChain (final drive)
ClutchBRAKTEC hydraulics - diaphragm GG 1/3
Performance
ExhaustAluminium
Chassis
Frame Type25CrMo4 steel central-tube
Rake23.0°
Front SuspensionTECH aluminium bar 39
Front Travel160 mm (6.3 inches)
Rear SuspensionTECH hydraulic damper with linkage, 2-way adjustable
Rear Travel174 mm (6.9 inches)
Wheelbase1320 mm (52.0 inches)
Ground Clearance325 mm (12.8 inches)
Wheels & Brakes
Front BrakesSingle disc. 4-piston caliper
Front Brake Ø185 mm (7.3 inches)
Rear BrakesSingle disc. 2-piston caliper
Rear Brake Ø150 mm (5.9 inches)
WheelsSpoked wheels with aluminium rims
Dimensions & Weight
Dry Weight66.7 kg (147.0 pounds)
Seat Height630 mm (24.8 inches) If adjustable, lowest setting.
Use this page to compare this motorcycle by its real specifications, not only by model name. Focus on the details that affect fit, comfort, handling, range and ownership.
Seat Height
Check the seat height against your inseam and riding posture before choosing a motorcycle.
Weight
Compare weight carefully because it affects low-speed handling, parking and confidence.
Fuel Capacity
Fuel capacity helps estimate touring range and how often you may need to stop.
Brakes
Brake setup is worth comparing if you ride in traffic, mountains or with a passenger.
Suspension
Suspension details can matter for comfort, road feel and long-distance riding.
Transmission
Transmission and final drive affect maintenance, smoothness and everyday usability.
