Built around Kymco's scooter motorcycle platform, the 2012 Kymco RS 125 relies on a 124 cc (7.6 cu in) air-cooled single cylinder, four-stroke powerplant. In factory specification, peak output is rated at 9.3 HP (6.8 kW) at 7,500 rpm while maximum torque reaches 8.5 Nm (6.3 lb-ft) at 6,000 rpm, transferring power to the rear wheel through a 4-speed gearbox and shaft drive (cardan) final drive. With a specific output of 75 HP per liter and a 1,500 rpm working window between peak torque (6,000 rpm) and peak power (7,500 rpm), the engine character is indicating a tractable, stress-free state of tune focused on everyday usability and broad torque delivery.
On the scales, the RS 125 measures 108 kg (238 lbs) dry, translating to a power-to-weight ratio of 0.09 HP/kg (11.61 kg per horsepower). Rider ergonomics and chassis geometry center around a 800 mm (31.5 in) seat height — offering a neutral standover height that accommodates most average-inseam riders without sacrificing cornering clearance. The 3.5-liter (0.9 US gal) fuel tank supports practical everyday commuting and weekend road stints.
Specific Output
75 HP/L
Power-to-Weight
0.09 HP/kg (11.61 kg/HP)
Power Band Window
6,000–7,500 rpm
Standover Height
800 mm (31.5 in)
Engine
Displacement124.0 ccm (7.57 cubic inches)
Engine TypeSingle cylinder, four-stroke
Engine DetailsSingle cylinder, four-stroke
Power9.3 HP (6.8 kW)) @ 7500 RPM
Torque8.5 Nm (0.9 kgf-m or 6.3 ft.lbs) @ 6000 RPM
Compression9.0:1
Bore x Stroke54.0 x 54.0 mm (2.1 x 2.1 inches)
Fuel SystemCarburettor
Fuel ControlOverhead Cams (OHC)
IgnitionCDI
CoolingAir
Transmission
Gearbox4-speed
Final DriveShaft drive (cardan) (final drive)
DrivelineCVT
Chassis
Frame TypeTubular steel
Front SuspensionHydraulic telescopic fork
Front Travel105 mm (4.1 inches)
Rear SuspensionSingle shock, adjustable
Rear Travel61 mm (2.4 inches)
Wheels & Brakes
Front Tyre120/70-12
Rear Tyre130/70-12
Front BrakesSingle disc
Front Brake Ø220 mm (8.7 inches)
Rear BrakesExpanding brake (drum brake)
Rear Brake Ø110 mm (4.3 inches)
WheelsPainted Alloy Wheels
Dimensions & Weight
Dry Weight108.0 kg (238.1 pounds)
Power/Weight0.0856 HP/kg
Seat Height800 mm (31.5 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.
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.
