Liquid-cooled, 4-stroke, SOHC, 4-valves
BORE X STROKE
52.0 mm x 58.6 mm
11.2 : 1
11.0kW (15.0PS) @ 9,000 rpm
11.5Nm (1.16kg-m) @ 8,000 rpm
Electronic Fuel Injection
Wet, multiple-disc coil spring
Upside-down telescopic fork, Ø41 mm
FRONT SUSPENSION STROKE
Hydraulic single disc, Ø292 mm
Swingarm, (Link type suspension)
REAR SUSPENSION STROKE
Hydraulic single disc, Ø220 mm
USABABLE TANK VOLUME
High-tech 125cc EU5 engine with VVA system
The latest R125 engine is EU5 compliant and benefits from an innovative Variable Valve Actuation system, that optimizes the valve position for high levels of low rpm torque and strong high rpm power – and also delivers excellent fuel efficiency. A wide diameter throttle body gives a smooth and controllable throttle feel – and the exhaust system produces a sporty sound.
Excellent combustion efficiency
To achieve high levels of intake efficiency the R125 engine is equipped with large intake and exhaust valves as well as a compact combustion chamber. Combined with the high-tech VVA – as well as the large throttle body and sports exhaust system – this configuration reduces fuel consumption and limits air pollution.
Delivering smooth and light handling characteristics as well as excellent high speed comfort, the R125 is one of the best handling bikes in its category. Its Deltabox frame uses optimum front and rear geometry and is fitted with an aluminium swingarm and 41mm upside down forks to give you the ultimate 125cc Supersport chassis specification.
Lightweight aluminium swingarm
Yamaha R-Series models are designed to give you the ultimate in style, performance and technology. And to underline its position as the premium 125cc Supersport model, the R125 features a lightweight aluminium swingarm. Manufactured using Yamaha’s advanced casting technology, its low weight and optimized rigidity deliver sporty handling performance.
A&S (Assist & Slipper) clutch
To help you take full advantage of the free-revving engine performance, the R125 is equipped with an A&S clutch that gives a light feel at the lever – for easy operation and precise control. This design ensures smooth and efficient acceleration, and during deceleration the A&S clutch helps to prevent rear wheel lock ups.
R-Series design DNA
Inspired by the iconic R1, the confident and aggressively styled face features dual LED headlights that reinforce the shared R-Series family DNA. Furthermore, the M1 MotoGP style front fairing underlines the race-bred specification, and with a 12 LED taillight and premium finish, there’s no mistaking the pure R-Series DNA in the R125’s stunning bodywork.