To revolutionise the 125cc class
Suzuki GSX-R line has defined sportbike performance for over 30 years, with more than a million sold worldwide. So the dedicated Suzuki engineers who have devoted their lives to the GSX-R take their responsibilities very seriously. Meet the revolutionary Suzuki GSX-R125 2018, with the best power-to-weight ratio and acceleration in the 125cc class.
There is a science to building high-performance engines and the GSX-R125’s DOHC engine is a perfect example of how to make a lot of power out of a very efficient and compact power plant. This power combines with strong torque and exceptional fuel economy, to create an engine worthy of the GSX-R marque.
The objective is sporty engine performance, character, combustion efficiency and fuel economy. This power combined with torque and balanced with fuel efficiency creates an engine worthy of the GSX-R marque. The GSX-R125 engine displaces an actual 125cc from a 62mm cylinder bore and a 41.2mm piston stroke. The larger bore makes room for two 24mm intake valves and two 21mm exhaust valves, set upright at narrow angles to improve the shape of the combustion chamber, increasing the compression ratio, performance and fuel economy.
Engine makes its high horsepower and reaches its generous torque, delivering strong, effective power across a broad rpm range. Aided by an effective liquid-cooling system with a large radiator helps keep the engine at the optimum temperature, producing consistent performance and maximising fuel efficiency and mileage. And the GSX-R125 comes with a smooth-shifting 6-speed transmission and an electric starter.
Advanced Electronic Fuel Injection
Suzuki GSX-R125 features advanced electronic fuel injection, which delivers fuel based on what the rider is doing with the twist-grip throttle as well as input from sensors monitoring engine rpm, intake air pressure and temperature, exhaust oxygen content and coolant temperature. To improve intake efficiency, throttle response, and engine power throughout the rpm range, the GSX-R125 has a 32mm throttle body.
At 134kg ready to ride, the GSX-R125 is light and compact, giving ultimate control in the corners for a fun and sporty ride. Low weight is key, this helps deliver a bike with responsive and rewarding handling for added confidence on the street and low lap times on the track.
Advanced Rider Technology
Suzuki GSX-R125 features some of our most advanced rider technology, including our all new key-less ignition system, and Suzuki Easy Start System.
Key-less Ignition System
Suzuki GSX-R125 features a convenient key-less ignition system. This means the rider can start the engine without putting the key in the ignition if the compact key is close enough to the motorcycle. Therefore, the rider doesn’t have to fumble to retrieve the compact key from a pocket or backpack.
Suzuki Easy Start System
The ECM on the GSX-R125 runs the one-touch Suzuki Easy Start system. The convenient Suzuki Easy Start System automatically starts the engine with one touch of the starter button mounted in the switch module on the right handlebar; there’s no need to hold the button down until the engine fires. Thanks to the new system, the rider doesn’t have to pull the clutch lever in to start the engine, as long as the transmission is in neutral.
To make the best use of every ounce of power from the GSX-R125’s class leading engine, the bikes sporty bodywork is also extremely aerodynamically efficient to reduce drag and maximise efficient speed. This design is the result of extensive wind tunnel development, and the sleek bodywork also enhances the GSX-R125’s easy handling character. Furthermore, it also has the smallest projected frontal area in the 125cc class helping to achieve that best in class acceleration and supports high levels of fuel efficiency.
Reflecting its GSX-R heritage, the GSX-R125 features vertically stacked LED headlights, with the low beam above the high beam, and position lights on each side of the headlight. The GSX-R125’s LED headlights are bright and compact, lighter and longer lasting compared to conventional halogen-bulb headlights seen on competing machines. Because LED headlights use about 15% of the electrical power required by conventional bulbs, less engine power is needed to run the motorcycle’s alternator, improving acceleration and fuel economy. The LED license plate light on the rear fender is light and compact and much more durable and vibration resistant than the conventional bulb lights installed on competing 125cc machines.
LCD Instrument Cluster
Suzuki GSX-R125 has a full LCD instrument panel set in a modern dashboard, framed by turn signal, neutral, high beam, coolant temperature, malfunction indicator lamp (MIL), ABS, and programmable engine-RPM indicator lights. The bright LCD panel includes a segmented-bar tachometer across the top; a digital speedometer; a gear position indicator; a digital clock; a digital odometer with dual trip meters; an average fuel consumption meter; a fuel gauge; and an oil change timing indicator.
Suzuki GSX-R 125 2018 SPECIFICATIONS
Metallic Triton Blue (YSF)
Solid Black 50% Gloss (291)
Brilliant White (YUH)
Engine: Four-stroke, 1-cylinder, liquid-cooled, DOHC
Displacement: 124.4 cm3 (7.6 cu.in)
Bore x Stroke: 62.0 mm × 41.2 mm (2.4 in × 1.6 in)
Compression Ratio: 11.0:1
Fuel System: Suzuki Fuel Injection
Lubrication: Wet sump
Ignition system: Electronic ignition (Transistorized)
Transmission: 6-speed constant mesh
Suspension Front: Telescopic, coil spring, oil damped
Suspension Rear: Link type, coil spring, oil damped
Brakes Front: Disc (Petal)
Brakes Rear: Disc (Petal)
Tires Front: 90/80-17M/C, tubeless
Tires Rear: 130/70-17M/C, tubeless
Fuel Tank Capacity: 11.0L (2.9/2.4 US/lmp gal)
Rake / Trail: 25.5° / 93.3 mm (3.7 in)
Ignition: Electronic ignition (Transistorized)
Headlight: 12V 55/60W (H4 halogen) & LED position lights
Tail Light: LED
Overall Length: 2,020 mm (79.5 in)
Overall Width: 700 mm (27.6 in)
Overall Height: 1,075 mm (42.3 in)
Wheelbase: 1,300 mm (51.2 in)
Ground Clearance: 160 mm (6.3 in)
Seat Height: 785 mm (30.9 in)
Curb Mass: 134 kg (295 lbs)
Suzuki GSX-R125 2018 Image Gallery