Built around Hyosung's allround motorcycle platform, the 2016 Hyosung RT125D pairs a 124.5 cc (7.6 cu in) oil & air-cooled single cylinder, four-stroke architecture with road-focused gearing. Internal engine geometry specifies a bore and stroke of 57.0 x 48.8 mm (2.2 x 1.9 inches) with a 11.3:1 compression ratio.
On the scales, the RT125D measures 135 kg (298 lbs) dry. Rider ergonomics and chassis geometry center around a 790 mm (31.1 in) seat height — offering a neutral standover height that accommodates most average-inseam riders without sacrificing cornering clearance, combined with a 1,350 mm (53.1 in) wheelbase engineered for quick, flickable steering geometry. The 9.1-liter (2.4 US gal) fuel tank paired with a rated consumption of 3.02 L/100 km provides an estimated theoretical range of roughly 301 km (187 miles) between fill-ups.
Within MotoLibrary's Hyosung archive, this model family spans 5 indexed model years from 2008 to 2016, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
Theoretical Range
~301 km (187 mi)
Engine
Displacement124.5 ccm (7.60 cubic inches)
Engine TypeSingle cylinder, four-stroke
Engine DetailsSingle cylinder, four-stroke
Compression11.3:1
Bore x Stroke57.0 x 48.8 mm (2.2 x 1.9 inches)
Fuel SystemCarburettor
Fuel ControlDouble Overhead Cams/Twin Cam (DOHC)
IgnitionElectronic
LubricationWet sump
CoolingOil & air
Transmission
Gearbox5-speed
Final DriveChain (final drive)
ClutchWet, Multiplate
Performance
Fuel Consumption3.02 litres/100 km (33.1 km/l or 77.89 mpg)
Greenhouse Gases70.1 CO2 g/km. (CO2 - Carbon dioxide emission)
Chassis
Frame TypeSteel
Front SuspensionTelescopic fork
Rear SuspensionMonoshock
Wheelbase1350 mm (53.1 inches)
Wheels & Brakes
Front Tyre130/80-18
Rear Tyre180/80-14
Front BrakesSingle disc
Rear BrakesExpanding brake (drum brake)
Dimensions & Weight
Dry Weight135.0 kg (297.6 pounds)
Seat Height790 mm (31.1 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.
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.
