High-tech 125cc engine with VVA system
The R125 engine 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 and emotive 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 produces impressive acceleration.
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 as well as a short aluminum swingarm and 41mm upside down forks to give you the ultimate 125 supersport chassis specification.
Lightweight aluminum 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 125 supersport, the R125 features a lightweight aluminum swingarm. Manufactured using Yamaha’s advanced casting technology, its short dimensions, low weight and optimised 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 LED twin-eye body design
Inspired by the iconic R1, the confident and aggressively styled face features dual LED headlights that reinforce the shared family DNA. Its 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.
11-litre fuel tank
The R125’s aggressive race-bred bodywork is complemented by a sleek fuel tank that emphasises the bike’s pure supersport pedigree. Consisting of a steel inner tank protected by lightweight close-fitting external covers with a high quality finish, the 11-litre tank can be easily removed for routine maintenance.
MotoGP-inspired YZR-M1 type cockpit
Everything about the R125 is designed to give you the ultimate supersport experience. Inspired by Yamaha’s MotoGP bike, the racy cockpit features a high quality handlebar crown, as well as a high-visibility LED instrument panel and brake lever protector that put you in total control on the track and on the street.
High-visibility LCD instruments
When you turn on the R125 you’ll be greeted with a personal greeting from the high-tech instruments – and once you’re moving the multi-function display gives you information on gear position and shift timing, as well as a VVA indicator. Housed in a stylish and sporty panel, these high-visibility instruments keep you informed.
Sporty and comfortable riding position
Besides its race-bred YZR-M1 style cockpit, the R125 is also equipped with a 2-piece rider and passenger seat featuring thick foam for a smooth ride. With an optimised handlebar position and aluminum rear set footrests, the R125’s ergonomics give a balanced riding experience that's both sporty and comfortable.
Wide 140-section rear tyre
To confirm its strong R-series DNA the R125 runs with a wide 140/70-17 rear tyre that gives excellent stability and confident cornering. Offering a good balance of grip and durability, this supersport style tyre is designed to enable you to optimise the potential of the engine’s wide spread of power, and its wide-section accentuates the bike’s aggressive R-series stance.
Outstanding braking performance
Equipped with a large diameter 292mm front disc and a 230mm rear disc, the R125’s braking systems produce outstanding performance. Featuring state-of-the-art calipers and lightweight discs that deliver powerful and progressive stopping power, this sophisticated braking setup gives you precise and accurate control.
Technical SpecificationsDownload Factsheet
- Engine type
- liquid-cooled, 4-stroke, SOHC, 4-valves
- Bore x stroke
- 52.0 mm x 58.6 mm
- Compression ratio
- 11.2 : 1
- Maximum power
- 11.0kW (15.0PS) @ 9,000 rpm
- Maximum torque
- 11.5Nm (1.16kg-m) @ 8,000 rpm
- Lubrication system
- Wet sump
- Clutch type
- Wet, multiple-disc coil spring
- Ignition system
- TCI (digital)
- Starter system
- Transmission system
- Constant Mesh, 6-speed
- Final transmission
- Fuel consumption
- CO2 emission
- Fuel system
- Electronic Fuel Injection
- Steel Deltabox
- Caster angle
- Front suspension system
- Upside-down telescopic fork, Ø41 mm
- Rear suspension system
- Swingarm, (Link type suspension)
- Front travel
- 130 mm
- Rear travel
- 114 mm
- Front brake
- Hydraulic single disc, Ø292 mm
- Rear brake
- Hydraulic single disc, Ø220 mm
- Front tyre
- 100/80-17 M/C
- Rear tyre
- 140/70-17 M/C
- Overall length
- 1,955 mm
- Overall width
- 680 mm
- Overall height
- 1,065 mm
- Seat height
- 825 mm
- Wheel base
- 1,355 mm
- Minimum ground clearance
- 155 mm
- Wet weight (including full oil and fuel tank)
- 142 kg
- Fuel tank capacity
- Oil tank capacity