At the heart of the 2021 Suzuki GSX-S125 naked motorcycle, Suzuki pairs a 124 cc (7.6 cu in) liquid-cooled single cylinder, four-stroke architecture with road-focused gearing.
On the scales, the GSX-S125 measures 134 kg (295 lbs) wet (curb). Rider ergonomics and chassis geometry center around a 785 mm (30.9 in) seat height — offering a neutral standover height that accommodates most average-inseam riders without sacrificing cornering clearance, combined with a 1,300 mm (51.2 in) wheelbase engineered for quick, flickable steering geometry. The 11-liter (2.9 US gal) fuel tank paired with a rated consumption of 1.92 L/100 km provides an estimated theoretical range of roughly 573 km (356 miles) between fill-ups.
Within MotoLibrary's Suzuki archive, this model family spans 7 indexed model years from 2017 to 2025, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
Theoretical Range
~573 km (356 mi)
Engine
Displacement124.0 ccm (7.57 cubic inches)
Engine TypeSingle cylinder, four-stroke
Fuel SystemInjection
Fuel ControlDouble Overhead Cams/Twin Cam (DOHC)
IgnitionElectric
LubricationWet sump
CoolingLiquid
Transmission
Gearbox6-speed
Final DriveChain (final drive)
ClutchWet, multi-disc
Performance
Fuel Consumption1.92 litres/100 km (52.1 km/l or 122.51 mpg)
Greenhouse Gases44.5 CO2 g/km. (CO2 - Carbon dioxide emission)
Chassis
Front SuspensionTelescopic, coil spring, oil damped
Rear SuspensionLink type, coil spring, oil damped
Wheelbase1300 mm (51.2 inches)
Ground Clearance160 mm (6.3 inches)
Wheels & Brakes
Front Tyre90/80-M17
Rear Tyre130/70-M17
Front BrakesSingle disc. Petal
Front Brake Ø290 mm (11.4 inches)
Rear BrakesSingle disc. Petal
Rear Brake Ø187 mm (7.4 inches)
Dimensions & Weight
Weight incl.134.0 kg (295.4 pounds)
Seat Height785 mm (30.9 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.
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.
Suspension
Suspension details can matter for comfort, road feel and long-distance riding.
Transmission
Transmission and final drive affect maintenance, smoothness and everyday usability.
