GAS GAS SM 125 - 2002 Specifications and Reviews

The 2002 GAS GAS SM 125 is a lightweight supermoto designed for agile city riding and novice riders seeking nimble handling. Powered by a 124cc liquid-cooled single-cylinder engine producing 36.8 horsepower, it combines quick acceleration with excellent maneuverability. Best known for its low seat height and compact proportions, the SM 125 excels in urban environments and tight technical courses.

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General information

CategorySuper motard
Year2002
ModelGAS GAS SM 125

Engine and Transmission Specifications

Transmission typefinal driveChain
Gearbox6-speed
Cooling systemLiquid
Fuel systemCarburettor
Bore x stroke54.0 x 54.5 mm (2.1 x 2.1 inches)
Torque25.20
Power36.80
Stroke2
Engine typeSingle cylinder
Capacity:124.00 ccm (7.57 cubic inches)

Physical measures and capacities

Wheelbase1,475 mm (58.1 inches)
Ground clearance290 mm (11.4 inches)
Seat height900 mm (35.4 inches) If adjustable, lowest setting.
 
 

GAS GAS SM 125 dimensions and frame

Rear brakes diameter220 mm (8.7 inches)
Rear brakesSingle disc
Front brakes diameter310 mm (12.2 inches)
Front brakesSingle disc
Rear tyre dimensions150/60-17
Front tyre dimensions120/60-17
Rear suspension travel320 mm (12.6 inches)
Front suspension travel295 mm (11.6 inches)
 
 

Speed and acceleration

Fuel capacity9.50 litres (2.51 gallons)

Other specs

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

Performance Profile & Rider Fit

7.5s
0-60 mph (est.)

Best For

Track70%
City75%
Cornering92%
Daily Riding45%
Touring15%
Passenger20%

Rider Profile

Best ForBest suited to intermediate or experienced riders who want a light, flickable bike to sharpen their cornering skills rather than a first-time beginner machine.
PurposeBuilt for tight, twisty roads and supermoto-style thrills, prioritizing agility and sharp handling over outright speed or long-distance capability.
Rider FitIts low 100 kg dry weight and slim chassis make it very manageable for shorter or lighter riders, though the 940 mm seat height requires reasonable inseam length.
CharacterA playful, high-revving single-cylinder supermoto with premium Marzocchi and Ohlins suspension that rewards an aggressive, engaged riding style.
Not Ideal ForNot a good fit for riders seeking a comfortable long-haul tourer, a passenger-friendly bike, or serious off-road adventure capability.

Character map is an editorial estimate based on this bike's specifications, not a lab-tested measurement.

Rider Fit Visualizer

2002 GAS GAS SM 125 Rider Ergonomics Assessment

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

Feet:

At 900mm, a rider of 175cm with a 79cm (estimated) inseam will reach the ground with cannot reach comfortably on the 2002 GAS GAS SM 125, with a relaxed knee angle of around 145 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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