GAS GAS SM 125 - 2004 Specifications and Reviews

The 2004 GAS GAS SM 125 is a lightweight super motard designed for nimble urban riding and enthusiast-level fun. Its 124cc liquid-cooled single-cylinder engine and minimal 100kg weight make it ideal for agile riders seeking responsive handling and manageable performance. Best known for exceptional maneuverability and approachable street-oriented capability, this Spanish-built machine suits learners and experienced riders alike.

Not Rated stars Average rating: Not Rated from 0 votes
.

General information

CategorySuper motard
Year2004
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)
Stroke2
Engine typeSingle cylinder
Capacity:124.00 ccm (7.57 cubic inches)

Physical measures and capacities

Wheelbase1,475 mm (58.1 inches)
Ground clearance340 mm (13.4 inches)
Seat height940 mm (37.0 inches) If adjustable, lowest setting.
Dry weight100.0 kg (220.5 pounds)
 
 

GAS GAS SM 125 dimensions and frame

Rear brakes diameter220 mm (8.7 inches)
Rear brakesSingle disc
Front brakes diameter300 mm (11.8 inches)
Front brakesSingle disc
Rear tyre dimensions150/60-17
Front tyre dimensions120/60-17
Rear suspension travel320 mm (12.6 inches)
Rear suspensionProgressive system, Ohlins shock absorber.
Front suspension travel295 mm (11.6 inches)
Front suspensionMarzocchi inverted fork, 50 mm
Frame typeTType deltabox, made of rectangular profile Cr-Mo
 
 

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

2004 GAS GAS SM 125 Rider Ergonomics Assessment

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

Feet:

At 940mm, a rider of 175cm with a 79cm (estimated) inseam will reach the ground with cannot reach comfortably on the 2004 GAS GAS SM 125, 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.

Find bikes that fit your height →

Rider Reviews

Add a Comment


Please Login or Register if you would like to leave a comment.