14 August. Friday 2026
GAS GAS SM 125 Halley - 2010 Specifications and Reviews
The 2010 GAS GAS SM 125 Halley is a lightweight supermoto designed for agile urban riders and track enthusiasts seeking nimble handling. Its liquid-cooled two-stroke engine delivers punchy performance in a compact package, while the upside-down forks and hydraulic clutch provide responsive control. Best known for versatility between street and dirt applications, it appeals to riders prioritizing maneuverability over raw power.
2010
General information | |
| Category | Super motard |
| Year | 2010 |
| Model | GAS GAS SM 125 Halley |
Engine and Transmission Specifications | |
| Clutch | Multidisc hydraulically operated. |
| Transmission type,final drive | Chain |
| Gearbox | 6-speed |
| Cooling system | Liquid |
| Lubrication system | By fuel mixture. |
| Ignition | Digital CDI Multispark. |
| Fuel system | Carburettor |
| 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 |
| Front brakes diameter | 260 mm (10.2 inches) |
| Front brakes | Single disc. 2 pistons caliper |
| Rear tyre dimensions | 120/70-17 |
| Front tyre dimensions | 100/80-17 |
| Rear suspension travel | 246 mm (9.7 inches) |
| Rear suspension | One-piece aluminium swing arm. Ohlins shock absorber. |
| Front suspension travel | 255 mm (10.0 inches) |
| Front suspension | 41 mm upside-down fork |
| Frame type | Deltabox* made of rectangular profile Cr Mo |
| | |
Physical measures and capacities | |
| Fuel capacity | 9.50 litres (2.51 gallons) |
| Wheelbase | 1,460 mm (57.5 inches) |
| Seat height | 945 mm (37.2 inches) If adjustable, lowest setting. |
| Weight incl. oil, gas, etc | 110.0 kg (242.5 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
Track75%
City78%
Cornering90%
Daily Riding45%
Touring20%
Passenger20%
Rider Profile
| Best For | Best suited to riders with at least some two-stroke and supermoto experience who enjoy a peaky, revvy power delivery. |
| Purpose | Built for flickable, playful supermoto riding on twisty backroads and tight tracks rather than distance or off-road work. |
| Rider Fit | Its featherweight chassis and low dry weight make it easy to manage for smaller or less physically strong riders, though the tall seat height demands reasonable inseam length. |
| Character | A sharp, lightweight two-stroke supermoto with premium suspension components that rewards an aggressive, engaged riding style. |
| Not Ideal For | Not a good fit for riders wanting comfortable long-distance touring, passenger carrying, or serious off-road capability. |
Character map is an editorial estimate based on this bike's specifications, not a lab-tested measurement.
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