2021 Swm SM 125 R Technical Analysis & Specification Breakdown
Built around Swm's enduro - offroad motorcycle platform, the 2021 Swm SM 125 R features a 124.7 cc (7.6 cu in) liquid-cooled single cylinder, four-stroke configuration. Internal engine geometry specifies a bore and stroke of 58.0 x 47.2 mm (2.3 x 1.9 inches) with a 12.8:1 compression ratio.
On the scales, the SM 125 R measures 110 kg (243 lbs) dry. Rider ergonomics and chassis geometry center around a 914 mm (36 in) seat height — reflecting a long-travel chassis stance that favors ground clearance and off-pavement control, combined with a 1,500 mm (59.1 in) wheelbase engineered for balanced agility and highway composure.
Within MotoLibrary's Swm archive, this model family spans 5 indexed model years from 2016 to 2025, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
Standover Height
914 mm (36 in)
Engine
Displacement124.7 ccm (7.61 cubic inches)
Engine TypeSingle cylinder, four-stroke
Compression12.8:1
Bore x Stroke58.0 x 47.2 mm (2.3 x 1.9 inches)
Fuel SystemInjection
Fuel ControlDouble Overhead Cams/Twin Cam (DOHC)
IgnitionElectronic
CoolingLiquid
Transmission
Gearbox6-speed
Final DriveChain (final drive)
Performance
Emission DetailsEuro 5
Chassis
Front SuspensionUpside down telescopic hydraulic fork with advanced axle; Fork legs Ø 41mm
Front Travel250 mm (9.8 inches)
Rear SuspensionProgressive “soft damp” single hydraulic shock absorber
Rear Travel250 mm (9.8 inches)
Wheelbase1500 mm (59.1 inches)
Ground Clearance275 mm (10.8 inches)
Wheels & Brakes
Front Tyre110/70-17
Rear Tyre140/70-17
Front BrakesSingle disc. CBS, floating caliper
Front Brake Ø300 mm (11.8 inches)
Rear BrakesSingle disc. CBS, floating caliper
Rear Brake Ø220 mm (8.7 inches)
Dimensions & Weight
Dry Weight110.0 kg (242.5 pounds)
Seat Height914 mm (36.0 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.
Weight
Compare weight carefully because it affects low-speed handling, parking and confidence.
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.
