Supermotos
2003GAS GAS SM 125
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The 2003 GAS GAS SM 125 is a two-stroke 125cc supermoto from the Spanish maker GAS GAS. Its liquid-cooled 124cc single makes 36.8 hp at 10,000 rpm and 25.2 Nm through a six-speed gearbox and chain. A tall 900 mm seat, 100 kg dry weight and 9.5-litre tank make it light and very lively.
- Capacity
- 124.0 ccm
- Engine
- Single
- Gearbox
- 6-speed
- Dry weight
- 100.0 kg
- Seat height
- 900 mm
- Power
- 36.8 HP (27.1 kW) @ 10000 RPM
How it rides
Editorial estimate from the spec sheet - not lab tested- Best for
- Built for tight, twisty roads and supermoto-style thrills, prioritizing agility and sharp handling over outright speed or long-distance capability.
- Built for
- A playful, high-revving single-cylinder supermoto with premium Marzocchi and Ohlins suspension that rewards an aggressive, engaged riding style.
- Not ideal for
- Not a good fit for riders seeking a comfortable long-haul tourer, a passenger-friendly bike, or serious off-road adventure capability.
Scores are derived from the spec sheet using the same model across every bike, so they compare like for like.
Will it fit you?
Worked out in your browser - nothing is sent to usEngine
- Capacity
- 124.0 ccm
- Power
- 36.8 HP (27.1 kW) @ 10000 RPM
- Torque
- 25.2 Nm (2.6 kgf-m)
- Engine type
- Single
- Power/weight ratio
- 0.3680 HP/kg (dry)
- Bore x stroke
- 54.0 x 54.5 mm
- Cooling system
- Liquid
- Fuel system
- Carburettor
Transmission
- Gearbox
- 6-speed
- Transmission type
- Manual
- Final drive
- Chain
Dimensions & weight
- Wheelbase
- 1475 mm
- Seat height
- 900 mm
- Dry weight
- 100.0 kg
- Fuel capacity
- 9.50 litres
- Ground clearance
- 290 mm
Chassis & suspension
- Frame
- TType deltabox, made of rectangular profile Cr-Mo
- Front suspension
- Marzocchi inverted fork, 50 mm
- Rear suspension
- Progressive system, Ohlins shock absorber.
- Front wheel travel
- 295 mm
- Rear wheel travel
- 320 mm
Brakes & wheels
- Front brakes
- Single disc
- Front brakes diameter
- 310 mm
- Rear brakes
- Single disc
- Rear brakes diameter
- 220 mm
- Front tyre
- 120/60-17
- Rear tyre
- 150/60-17
Specs last verified against published sources: .
Compiled from manufacturer documentation and user contributions, corrected on an ongoing basis. Spotted something wrong? Tell us.
What changed, year to year
Differences highlighted| Specification | 2002 | 2003 | 2004 |
|---|---|---|---|
| Capacity | 124 cc | 124 cc | 124 cc |
| Dry weight | 100 kg | 100 kg | 100 kg |
| Seat height | 900 mm | 900 mm | 940 mm |
| Fuel capacity | 9.5 L | 9.5 L | 9.5 L |
Illustrative - generated automatically by diffing the year records already on file, not a manufacturer-published changelog.
Rider Reviews
Common questions
What is the engine size of the GAS GAS SM 125?
The 2003 GAS GAS SM 125 has a Capacity of 124.0 ccm (7.57 cubic inches).
What engine power does the GAS GAS SM 125 have?
The 2003 GAS GAS SM 125 has a Power of 36.8 HP (27.1 kW) @ 10000 RPM.
How many gears does the GAS GAS SM 125 have?
The 2003 GAS GAS SM 125 has a Gearbox of 6-speed.
What is the torque of the GAS GAS SM 125?
The 2003 GAS GAS SM 125 has a Torque of 25.2 Nm (2.6 kgf-m or 18.6 ft.lbs).
How much does the GAS GAS SM 125 weigh?
The 2003 GAS GAS SM 125 has a Dry weight of 100.0 kg (220.5 pounds).
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