2002 GAS GAS SM 125 Technical Analysis & Specification Breakdown
Built around GAS GAS's super motard motorcycle platform, the 2002 GAS GAS SM 125 features a 124 cc (7.6 cu in) liquid-cooled single cylinder, two-stroke configuration. In factory specification, peak output is rated at 36.8 HP (26.9 kW) at 10,500 rpm while maximum torque reaches 25.2 Nm (18.6 lb-ft) at 10,000 rpm, transferring power to the rear wheel through a 6-speed gearbox and chain final drive. With a specific output of 296.8 HP per liter and a 500 rpm working window between peak torque (10,000 rpm) and peak power (10,500 rpm), the engine character is placing it firmly in high-revving supersport territory where top-end breathing dominates.
Rider ergonomics and chassis geometry center around a 900 mm (35.4 in) seat height — reflecting a long-travel chassis stance that favors ground clearance and off-pavement control, combined with a 1,475 mm (58.1 in) wheelbase engineered for balanced agility and highway composure. The 9.5-liter (2.5 US gal) fuel tank supports practical everyday commuting and weekend road stints.
Within MotoLibrary's GAS GAS archive, this model family spans 2 indexed model years from 2002 to 2004, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
Specific Output
296.8 HP/L
Power Band Window
10,000–10,500 rpm
Standover Height
900 mm (35.4 in)
Engine
Displacement124.0 ccm (7.57 cubic inches)
Engine TypeSingle cylinder, two-stroke
Engine DetailsSingle cylinder, two-stroke
Power36.8 HP (26.9 kW)) @ 10500 RPM
Torque25.2 Nm (2.6 kgf-m or 18.6 ft.lbs) @ 10000 RPM
Bore x Stroke54.0 x 54.5 mm (2.1 x 2.1 inches)
Fuel SystemCarburettor
CoolingLiquid
Transmission
Gearbox6-speed
Final DriveChain (final drive)
Chassis
Front Travel295 mm (11.6 inches)
Rear Travel320 mm (12.6 inches)
Wheelbase1475 mm (58.1 inches)
Ground Clearance290 mm (11.4 inches)
Wheels & Brakes
Front Tyre120/60-17
Rear Tyre150/60-17
Front BrakesSingle disc
Front Brake Ø310 mm (12.2 inches)
Rear BrakesSingle disc
Rear Brake Ø220 mm (8.7 inches)
Dimensions & Weight
Seat Height900 mm (35.4 inches) If adjustable, lowest setting.
Use this page to compare this motorcycle by its real specifications, not only by model name. Focus on the details that affect fit, comfort, handling, range and ownership.
Power
Compare engine output with similar motorcycles if acceleration, highway use or two-up riding matters.
Torque
Torque is useful for judging real-world pull, especially for touring, commuting and loaded riding.
Seat Height
Check the seat height against your inseam and riding posture before choosing a motorcycle.
Fuel Capacity
Fuel capacity helps estimate touring range and how often you may need to stop.
Brakes
Brake setup is worth comparing if you ride in traffic, mountains or with a passenger.
Transmission
Transmission and final drive affect maintenance, smoothness and everyday usability.
