GAS GAS SM 125 Halley - 2009 Specifications and Reviews

The 2009 GAS GAS SM 125 Halley is a lightweight super motard designed for novice and intermediate riders seeking agile street and light off-road performance. Its liquid-cooled 124cc single-cylinder engine and nimble 99kg chassis deliver responsive handling and maneuverability ideal for urban commuting and recreational riding.

2009
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General information

CategorySuper motard
Year2009
ModelGAS GAS SM 125 Halley

Engine and Transmission Specifications

ClutchMultidisc hydraulically operated.
Gearbox6-speed
Cooling systemLiquid
Lubrication systemBy fuel mixture.
StarterKick
IgnitionDigital CDI Multispark.
Fuel systemCarburettor. 26 mm
Bore x stroke54.0 x 54.5 mm (2.1 x 2.1 inches)
Stroke2
Engine typeSingle cylinder
Capacity:124.00 ccm (7.57 cubic inches)

Physical measures and capacities

Wheelbase1,460 mm (57.5 inches)
Seat height945 mm (37.2 inches) If adjustable, lowest setting.
Dry weight99.0 kg (218.3 pounds)
 
 

GAS GAS SM 125 Halley dimensions and frame

Rear brakes diameter220 mm (8.7 inches)
Rear brakesSingle disc
Front brakes diameter260 mm (10.2 inches)
Front brakesSingle disc. 4 pistons caliper
Rear tyre dimensions120/70-17
Front tyre dimensions100/80-17
Rear suspension travel246 mm (9.7 inches)
Rear suspensionOne-piece aluminium swing arm. Ohlins shock absorber.
Front suspension travel255 mm (10.0 inches)
Front suspension41 mm upside-down fork
Frame typeType Deltabox made of rectangular profile CrMo.

Speed and acceleration

Color optionsBlack
Fuel capacity9.50 litres (2.51 gallons)

Other specs

MaintenanceFind parts, fluids, filters, maintenance tools and service items on eBay

Performance Profile & Rider Fit

Best For

Track75%
City78%
Cornering90%
Daily Riding45%
Touring20%
Passenger20%

Rider Profile

Best ForBest suited to riders with at least some two-stroke and supermoto experience who enjoy a peaky, revvy power delivery.
PurposeBuilt for flickable, playful supermoto riding on twisty backroads and tight tracks rather than distance or off-road work.
Rider FitIts 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.
CharacterA sharp, lightweight two-stroke supermoto with premium suspension components that rewards an aggressive, engaged riding style.
Not Ideal ForNot 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.

Rider Fit Visualizer

2009 GAS GAS SM 125 Halley Rider Ergonomics Assessment

Calculated in your browser only - your height/inseam are never sent to our servers.

Feet:

At 945mm, a rider of 175cm with a 79cm (estimated) inseam will reach the ground with cannot reach comfortably on the 2009 GAS GAS SM 125 Halley, with a stretched knee angle of around 160 degrees and a forward-leaning riding position.

Data quality: measured. Assumes about 30mm of suspension sag once seated (a typical street-bike rule of thumb - stiffer or softer suspension will vary). This is an approximation from category-typical geometry and generic body proportions, not a measurement of this specific bike or you - sit on it before you buy.

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