Trials Bikes
2010GAS GAS Halley 125 4T
26 fields on record
The 2010 GAS GAS Halley 125 4T is a lightweight trial motorcycle designed for beginners and youth riders seeking to master technical riding skills. Powered by a reliable 124cc air-cooled four-stroke engine paired with a six-speed gearbox, it excels in navigating tight obstacles and challenging terrain. Known for its nimble handling and durable Cromoly steel frame, the Halley 125 remains a popular choice for entry-level trial competition and training.
- Capacity
- 124.0 ccm
- Engine
- Single, four-stroke
- Gearbox
- 6-speed
- Dry weight
- Not on record
Know it? Add it → - Seat height
- 945 mm
- Power
- 15.0 HP (11.0 kW)
How it rides
Editorial estimate from the spec sheet - not lab tested- Best for
- Built purely for low-speed technical trials riding over obstacles, rocks, and tight terrain rather than any kind of road or touring use.
- Built for
- A precise, featherweight, high-travel-suspension tool that rewards finesse and clutch control far more than outright power.
- Not ideal for
- This is not the bike for anyone wanting a comfortable seat, sustained speed, or a practical daily commuter or touring machine.
Scores are derived from the spec sheet using the same model across every bike, so they compare like for like.
Engine
- Capacity
- 124.0 ccm
- Power
- 15.0 HP (11.0 kW)
- Engine type
- Single, four-stroke
- Bore x stroke
- 54.0 x 54.5 mm
- Cooling system
- Air
- Fuel system
- Carburettor
- Starting
- Kick
Transmission
- Gearbox
- 6-speed
- Transmission type
- Manual
- Final drive
- Chain
- Clutch
- Multidisc hydraulically operated
Dimensions & weight
- Wheelbase
- 1460 mm
- Seat height
- 945 mm
Chassis & suspension
- Frame
- Made with Cromoly tubing. Aluminium swing arm. .
- Front suspension
- Fork, 41 mm.
- Rear suspension
- One-piece aluminium swing arm
- Front wheel travel
- 255 mm
- Rear wheel travel
- 246 mm
Brakes & wheels
- Front brakes
- Single disc. 2-piston caliper.
- Front brakes diameter
- 260 mm
- Rear brakes
- Single disc. Single-piston
- Rear brakes diameter
- 220 mm
- Front tyre
- 2.75-21
- Rear tyre
- 4.10-18
Other
- Color options
- Black
Compiled from manufacturer documentation and user contributions, corrected on an ongoing basis. Spotted something wrong? Tell us.
Rider Reviews
Common questions
What is the engine size of the GAS GAS Halley 125 4T?
The 2010 GAS GAS Halley 125 4T has a Capacity of 124.0 ccm (7.57 cubic inches).
What engine power does the GAS GAS Halley 125 4T have?
The 2010 GAS GAS Halley 125 4T has a Power of 15.0 HP (11.0 kW).
How many gears does the GAS GAS Halley 125 4T have?
The 2010 GAS GAS Halley 125 4T has a Gearbox of 6-speed.
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