Close this search box.

2021 Suzuki GSX-R125 Specifications


2021 Suzuki GSX-R125, the best power-to-weight ratio, torque-to-weight ratio and acceleration, plus nimble handling and great fuel economy in the 125cc class.

The 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 Suzuki GSX-R take their responsibilities very seriously. Meet the revolutionary Suzuki GSX-R125, with the best power-to-weight ratio and acceleration in the 125cc class.

2021 Suzuki GSX-R125 Features


There is a science to building high-performance engines and the Suzuki 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 Suzuki GSX-R marque.


The Anti-lock Brake System¹ (ABS) is the latest Bosch ABS 10 base unit, which is the lightest and most compact two-channel ABS system on the market. The pro-active system monitors wheel speed and immediately intervenes when imminent wheel lock is detected-before actual lock-up. The compact ABS system as installed on the Suzuki GSX-R125 weighs just 0.59 kilograms.

The Suzuki GSX-R125 features some of our most advanced rider technology, including our all new key-less ignition system, and Suzuki Easy Start System.

The 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.


The ECM on the Suzuki 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 Suzuki 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 Suzuki 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 Suzuki 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 Suzuki 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 licence 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.


The 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.


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 Suzuki 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.

The 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 Suzuki GSX-R125 comes with a smooth-shifting 6-speed transmission and an electric starter.


The 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 Suzuki GSX-R125 has a 32mm throttle body.

2021 Suzuki GSX-R125 Specifications

Metallic Triton Blue / Solarise Silver (B57)
Metallic Triton Blue (YSF)
Titan Black (YVU)
Stronger Red / Titan Black (GTA)

Engine: Four-stroke, 1-cylinder, liquid-cooled, DOHC
Displacement: 124.4 cm3 (7.6
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
Starter: Electric
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))
Wheelbase: 1,300 mm (51.2 in)
Overall Height: 1,075 mm (42.3 in)
Ground Clearance: 160 mm (6.3 in)
Overall Width: 700 mm (27.6 in
Seat Height: 785 mm (30.9 in)
Curb Mass: 134 kg (295 lbs)

Related Posts