Enduro Bikes
2003GAS GAS EC125
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The 2003 GAS GAS EC125 is a lightweight two-stroke enduro bike from the Spanish brand GAS GAS. Its liquid-cooled 125cc single makes 36.8 hp and 25.2 Nm through a six-speed gearbox. A 940 mm seat, 101 kg dry weight and a 9.5-litre tank make it lively on tight trails.
- Capacity
- 125.0 ccm
- Engine
- Single, two-stroke
- Gearbox
- 6-speed
- Dry weight
- 101.0 kg
- Seat height
- 940 mm
- Power
- 36.8 HP (27.1 kW)
How it rides
Editorial estimate from the spec sheet - not lab tested- Best for
- Built purely for technical enduro and trail riding, not for road use or general commuting.
- Built for
- A raw, lightweight two-stroke enduro weapon that thrives on aggressive throttle input and quick direction changes through tight, technical terrain.
- Not ideal for
- Not suitable for riders seeking comfort, passenger capability, highway touring, or a forgiving low-maintenance daily ride.
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
- 125.0 ccm
- Power
- 36.8 HP (27.1 kW)
- Torque
- 25.2 Nm (2.6 kgf-m) @ 10000 RPM
- Engine type
- Single, two-stroke
- Power/weight ratio
- 0.3644 HP/kg (dry)
- Bore x stroke
- 54.0 x 54.5 mm
- Cooling system
- Liquid
- Fuel system
- Carburettor
- Starting
- Kick
- Ignition
- Digital magnetic flywheel Kokusan*
- Lubrication system
- 2% mixture.
Transmission
- Gearbox
- 6-speed
- Transmission type
- Manual
- Final drive
- Chain
- Clutch
- Hydraulic multidisc
Dimensions & weight
- Wheelbase
- 1475 mm
- Overall length
- 2200 mm
- Overall width
- 830 mm
- Overall height
- 1260 mm
- Seat height
- 940 mm
- Dry weight
- 101.0 kg
- Fuel capacity
- 9.50 litres
- Ground clearance
- 340 mm
Chassis & suspension
- Frame
- Deltabox type, made of rectangular section cromoly tube
- Front suspension
- Marzocchi telehydrailc fork, 45 mm
- Rear suspension
- Ohlns progressive system
- Front wheel travel
- 295 mm
- Rear wheel travel
- 320 mm
Brakes & wheels
- Front brakes
- Single disc
- Front brakes diameter
- 260 mm
- Rear brakes
- Single disc
- Rear brakes diameter
- 220 mm
- Front tyre
- 90/90-21
- Rear tyre
- 140/80-18
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 | 2006 | 2010 | 2013 | 2025 |
|---|---|---|---|---|---|---|
| Capacity | 125 cc | 125 cc | 124 cc | 124 cc | 124 cc | 125 cc |
| Dry weight | 101 kg | 101 kg | 96 kg | 92 kg | 92 kg | 100 kg |
| Seat height | 940 mm | 940 mm | 940 mm | 945 mm | 945 mm | 956 mm |
| Fuel capacity | 9.5 L | 9.5 L | 9.5 L | 9.5 L | 9.5 L | 9 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 EC125?
The 2003 GAS GAS EC125 has a Capacity of 125.0 ccm (7.63 cubic inches).
What engine power does the GAS GAS EC125 have?
The 2003 GAS GAS EC125 has a Power of 36.8 HP (27.1 kW).
How many gears does the GAS GAS EC125 have?
The 2003 GAS GAS EC125 has a Gearbox of 6-speed.
What is the torque of the GAS GAS EC125?
The 2003 GAS GAS EC125 has a Torque of 25.2 Nm (2.6 kgf-m or 18.6 ft.lbs) @ 10000 RPM.
How much does the GAS GAS EC125 weigh?
The 2003 GAS GAS EC125 has a Dry weight of 101.0 kg (222.7 pounds).
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