14 August. Friday 2026
GAS GAS Halley 125 2T - 2010 Specifications and Reviews
The 2010 GAS GAS Halley 125 2T is a lightweight trial motorcycle engineered for beginners and intermediate riders seeking technical off-road performance. Powered by a nimble 124cc two-stroke engine with liquid cooling and a six-speed gearbox, it excels in navigating tight sections and rocky terrain. The bike is renowned for its agile handling, responsive power delivery, and affordability in the competitive trial motorcycle segment.
2010
General information | |
| Category | Trial |
| Year | 2010 |
| Model | GAS GAS Halley 125 2T |
| | |
Engine and Transmission Specifications | |
| Clutch | Multiple disks in oil bath, hydraulic |
| Transmission type,final drive | Chain |
| Gearbox | 6-speed |
| Cooling system | Liquid |
| Fuel system | Carburettor. 26 mm |
| Bore x stroke | 54.0 x 54.5 mm (2.1 x 2.1 inches) |
| Engine type | Single cylinder, two-stroke |
| Capacity: | 124.00 ccm (7.57 cubic inches) |
Brakes, suspension, Frame and wheels | |
| Rear brakes diameter | 220 mm (8.7 inches) |
| Rear brakes | Single disc. Single-piston |
| Front brakes diameter | 260 mm (10.2 inches) |
| Front brakes | Single disc. Twin piston caliper. |
| Rear tyre dimensions | 110/80-18 |
| Front tyre dimensions | 80/90-21 |
| Rear suspension travel | 246 mm (9.7 inches) |
| Rear suspension | One-piece aluminium swing arm |
| Front suspension travel | 255 mm (10.0 inches) |
| Front suspension | Fork, 41 mm. |
| Frame type | Deltabox*, made with Cromoly tubing. Aluminium swing arm. |
| | |
Physical measures and capacities | |
| Fuel capacity | 7.40 litres (1.96 gallons) |
| Wheelbase | 1,460 mm (57.5 inches) |
| Seat height | 945 mm (37.2 inches) If adjustable, lowest setting. |
| Weight incl. oil, gas, etc | 107.0 kg (235.9 pounds) |
| Dry weight | 99.0 kg (218.3 pounds) |
Other specs | |
| Maintenance | Find parts, fluids, filters, maintenance tools and service items on eBay |
| Color options | Black/yellow |
| Starter | Kick |
Performance Profile & Rider Fit
Best For
Track5%
City15%
Cornering60%
Daily Riding10%
Touring5%
Passenger0%
Rider Profile
| Best For | This is a specialist trials machine best suited to riders who already have off-road or trials experience, or absolute beginners specifically entering the sport under instruction, since it is not a general-purpose motorcycle. |
| Purpose | Built purely for competitive and recreational trials riding, where the goal is tackling obstacles, balance, and technical terrain at very low speeds rather than covering distance or riding on roads. |
| Rider Fit | Its extremely light weight and tall, narrow seat-less riding stance demand strong legs, core balance, and standing-based control rather than seated comfort or muscle bulk. |
| Character | A featherweight, high-travel-suspension two-stroke that rewards precise throttle and clutch control, feeling nimble, responsive, and almost bicycle-like in tight, technical situations. |
| Not Ideal For | This bike is not suitable for riders wanting a comfortable commuter, a touring companion, a passenger-carrying bike, or any kind of sustained road or highway riding. |
Character map is an editorial estimate based on this bike's specifications, not a lab-tested measurement.
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