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MotoLibrary Score
36/100Commuter
Power/Weight
0.09 hp/kg
Top Speed
96 km/h
Engine
125 ccm
Technical Overview
2025 Yuki 125i Sport R Technical Analysis & Specification Breakdown
Built around Yuki's naked motorcycle platform, the 2025 Yuki 125i Sport R features a 125 cc (7.6 cu in) single cylinder, four-stroke configuration. In factory specification, peak output is rated at 12.7 HP (9.3 kW) at 9,000 rpm, transferring power to the rear wheel through a 6-speed gearbox and chain final drive. With a specific output of 101.6 HP per liter, the engine character is reflecting a performance-oriented street tune that balances strong mid-range pull with an energetic top-end rush.
On the scales, the 125i Sport R measures 149 kg (328 lbs) dry, translating to a power-to-weight ratio of 0.09 HP/kg (11.73 kg per horsepower). Rider ergonomics and chassis geometry center around a 780 mm (30.7 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 13-liter (3.4 US gal) fuel tank supports practical everyday commuting and weekend road stints, while factory top speed is listed at 96 km/h (60 mph).
Specific Output
101.6 HP/L
Power-to-Weight
0.09 HP/kg (11.73 kg/HP)
Standover Height
780 mm (30.7 in)
Engine
Displacement125.0 ccm (7.63 cubic inches)
Engine TypeSingle cylinder, four-stroke
Power12.7 HP (9.3 kW)) @ 9000 RPM
Fuel SystemInjection. Delphi
Fuel ControlOverhead Cams (OHC)
IgnitionCDI
Transmission
Gearbox6-speed
Final DriveChain (final drive)
Performance
Top Speed96.0 km/h (59.7 mph)
Emission DetailsEuro 5
Chassis
Frame TypeUnderbone
Front SuspensionTelescopic fork
Rear SuspensionMonoshock
Wheelbase1350 mm (53.1 inches)
Wheels & Brakes
Front Tyre100/80-17
Rear Tyre140/70-17
Front BrakesSingle disc
Front Brake Ø265 mm (10.4 inches)
Rear BrakesSingle disc
Rear Brake Ø240 mm (9.4 inches)
Dimensions & Weight
Dry Weight149.0 kg (328.5 pounds)
Power/Weight0.0855 HP/kg
Seat Height780 mm (30.7 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.
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.
