The 2011 GAS GAS TXT Pro Racing 125 is a lightweight trial motorcycle designed for competitive riders seeking precision and maneuverability. Its liquid-cooled 125cc two-stroke engine and adjustable Marzocchi suspension deliver responsive handling essential for navigating challenging terrain. Built on a chrome-molybdenum frame, it excels in trial competition where technical skill and bike control are paramount.
Editorial estimate from the spec sheet - not lab tested
Off-road & trail100%
Cornering90%
City riding5%
Daily riding5%
Touring3%
Two-up0%
Track10%
Best for
Built purely for low-speed technical trials competition, focused on balance, obstacle negotiation, and precision control rather than speed or distance riding.
Built for
A featherlight, purpose-built two-stroke trials weapon with sharp, direct handling, minimal weight, and razor-focused off-road agility.
Not ideal for
This is not the bike for anyone wanting a comfortable seat, highway speed, luggage capacity, or a passenger-friendly ride.
Scores are derived from the spec sheet using the same model across every bike, so they compare like for like.
Full specifications
Engine
Capacity
125.0 ccm
Power
15.0 HP (11.0 kW)
Engine type
Single, two-stroke
Power/weight ratio
0.2290 HP/kg (dry)
Bore x stroke
54.0 x 54.5 mm
Cooling system
Liquid
Fuel system
Carburettor
Starting
Kick
Ignition
CDI digital magnetic flywheel
Lubrication system
2.5 % Mixture
Transmission
Gearbox
6-speed
Transmission type
Manual
Final drive
Chain
Clutch
GG 1/3 hydraulic-diaphragm-system
Dimensions & weight
Wheelbase
1340 mm
Overall length
2045 mm
Overall width
825 mm
Seat height
650 mm
Dry weight
65.5 kg
Fuel capacity
2.50 litres
Chassis & suspension
Frame
Chrom-Molybdenum tubular frame
Front suspension
Marzocchi 40 mm Aluminium Right-Sight-Up. Adjustable compression and rebound.
Rear suspension
Aluminium swingarm, Progressive linkage system. Ohlins hydraulic mono shock absorber. Adjustable rebound and spring preload.
Front wheel travel
177 mm
Rear wheel travel
164 mm
Brakes & wheels
Front brakes
Single disc. Galfer ´Wave´ floating, 4-piston
Front brakes diameter
185 mm
Rear brakes
Single disc. Galfer ´Wave´ floating, 2-piston
Rear brakes diameter
150 mm
Front tyre
2.75-21
Rear tyre
4.00-18
Other
Color options
Red/black
Compiled from manufacturer documentation and user contributions, corrected on an ongoing basis. Spotted something wrong? Tell us.
What changed, year to year
Differences highlighted
Specification
2011
2012
Capacity
125 cc
125 cc
Dry weight
66 kg
66 kg
Seat height
650 mm
650 mm
Fuel capacity
2.5 L
2.5 L
Illustrative - generated automatically by diffing the year records already on file, not a manufacturer-published changelog.
Rider Reviews
—
☆☆☆☆☆
Be the first to rate
Please log in or register if you'd like to leave a comment.
Please log in or register if you'd like to leave a comment.
Own one? Add it to My Garage and write an owner review with an Owner badge.