2025 Yamaha R125

When you purchase this machine, you'll have the option to get the Datatool Stealth S5 supplied and fitted for only £99. Requires a minimum of 12 month subscription (less than £10 a month) 

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The 2025 Yamaha R125 is available in Tech Black and Icon Blue

R-CONNECTION

Featuring race-developed Supersport geometry, the Deltabox chassis is equipped with state-of-the-art 41mm KYB upside-down front forks and link-type rear suspension for super-agile handling. The footrest/seat/handlebar layout gives a sporty riding position for optimum control – and smartphone-connected 5-inch TFT instruments keep you informed – and in touch. And equipped with a powerful central LED headlight and dual LED position lights and M-shaped nose, its aggressive new face oozes pure R-Series DNA.

For strong performance at all speeds the 125cc 4-stroke engine is equipped with Yamaha’s power-boosting Variable Valve Actuation (VVA) technology and exhaust updates – and the traction control system and assist & slipper clutch enhance controllability when you’re accelerating and decelerating. With a premium finish available in a choice of next generation Icon Blue and Tech Black with new graphics, R125 has everything you need to connect to R/World.

R1-inspired 5-inch TFT instruments

The R1-inspired 5-inch colour TFT instruments provide you with clear information and underline the R125's premium status and best-in-class specification. Select your ‘Street’ or ‘Track’ screen theme depending on the riding situation – and match the programmable shift light and rpm meter range easily in 200 rpm increments to your riding style and individual preferences.

Smartphone connectivity

It's easy to stay connected when you're riding the R125 by linking your smartphone to its TFT instruments using Bluetooth® and the MyRide app. Once connected, you'll have access to turn-by-turn navigation and destination weather conditions, plus incoming call and text message previews and music song and artist information on the 5-inch TFT screen.

R1-type handlebar crown and switches

Everything about the R125 is designed to give you the ultimate Supersport riding experience. Inspired by Yamaha’s MotoGP® bike, the racy cockpit features a high-quality R1-type handlebar crown – and the clip-on handlebars are equipped with an R1-replica right switch cluster.

R7-inspired LED headlights and position lights

The powerful and compact central LED headlight located in the centre of the M1 MotoGP® style nose underlines the R125's big bike attitude. Together with the R7-style LED position lights this aggressive face oozes pure R-Series DNA.

Dynamic next generation Yamaha Racing design

Inspired by Yamaha’s winning race machines, the R125’s next generation aerodynamic bodywork gives this lightweight Supersport a commanding big bike look and feel. Its aggressive R-Series face features an M-shaped nose inspired by the M1 MotoGP® bike to underline its racing heritage – and the next generation Icon Blue and continued Tech Black colours with dynamic graphics highlight the bike’s premium finish.

Traction control system

The R125’s traction control system gives you a high degree of controllability during hard acceleration by reducing driving force to the rear wheel, if any tendency to slip is detected. The premium and high specification also includes an Assist & Slipper clutch for controlled deceleration. And the R125 is also pre-wired for the fitment of an optional quick shift system for seamless upshifts.

Torque rich 125cc EURO5+ 4-stroke engine with VVA

Producing 11 kW (15 HP) at 9.000 rpm, the R125's torque rich 125cc EURO5+ 4-stroke engine benefits from large intake and exhaust valves and a compact combustion chamber for impressive acceleration. Its performance-boosting Variable Valve Actuation (VVA) system optimizes the valve timing, to secure a good torque delivery and powerful response throughout the whole rpm range – and the revised sports exhaust system sounds great at all speeds!

High specification suspension

Like every Yamaha R-Series, the R125 is equipped with state-of-the-art suspension. The 41mm KYB upside-down front forks provide an idealised balance of shock absorption and handling stability – while the rear link-type suspension system is designed to ensure excellent roadholding together with a high level of riding comfort.

Deltabox frame and aluminium swingarm

Yamaha’s race developed Deltabox frame design is a signature element of R-Series Supersport technology, and its combination of low weight with high strength ensures agile and stable handling performance. And combined with premium front and rear suspension and a short aluminium swingarm, this class-leading chassis provides you with a lightweight Supersport handling experience.

Outstanding braking performance

Equipped with a large diameter 292mm floating front disc as well as a 230mm rear disc, the braking systems of the R125 produce outstanding performance. Featuring a 2-pot radial mount front caliper and lightweight front and rear discs for powerful and progressive stopping power, this sophisticated braking set-up gives you precise and accurate control.

Wide 140-section Michelin Pilot Street rear tyre

To confirm its strong R-series DNA, the R125 runs on Michelin Pilot Street tyres 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 broad spread of power, and its wide section accentuates the bike’s aggressive R-Series stance.

Sporty riding position

Besides the M1 style MotoGP®-inspired cockpit, the race-bred R125 is also equipped with a 2-piece rider and passenger seat featuring thick foam for a smooth ride. With an optimized handlebar position as well as a sculpted fuel tank with recessed knee-grip areas and aluminium rear set footrests, the R125's ergonomics give a balanced riding experience that's both sporty and comfortable.

SPECIFICATIONS

ENGINE

Engine type - 4-stroke, Liquid-cooled, SOHC, 4-valves

Displacement - 125cc

Bore x stroke - 52,0 mm x 58,7 mm

Compression ratio - 11.2 : 1

Maximum power - 11.0kW (15.0PS) @ 10,000 rpm

Maximum torque - 11.5Nm (1.16kg-m) @ 8,000 rpm

Lubrication system - Wet sump

Clutch type - Wet, Multiple Disc

Ignition system - TCI (digital)

Starter system - Electric

Transmission system - Constant Mesh, 6-speed

Final transmission - Chain

Fuel consumption - 2.1 l/100km

CO2 emission - 47 g/km

Fuel system - Fuel Injection

CHASSIS

Frame - Diamond

Caster angle - 26º

Trail - 95mm

Front suspension system - Upside-down telescopic fork, Ø41 mm

Rear suspension system - Swingarm, (Link type suspension)

Front travel - 130 mm

Rear travel - 110 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

DIMENSIONS

Overall length - 1,990 mm

Overall width - 715 mm

Overall height - 1,145 mm

Seat height - 820 mm

Wheel base - 1,325 mm

Minimum ground clearance - 160 mm

Wet weight (including full oil and fuel tank) - 141 kg

Fuel tank capacity - 11.0 litres

Oil tank capacity - 1.15 litres