A GSX-S to Revolutionize The Lightweight Class
Suzuki has defined sportbike performance for more than 30 years.
It started with the legendary GSX-R line, with more than a million sold worldwide. And the dedicated Suzuki engineers behind the GSX-R line take their responsibilities very seriously: Every GSX-R must be very light and best performing in its class, in an unbeatable package. Now Suzuki engineers have applied their expertise and design philosophy to an exciting new street sport 125cm3-class motorcycle, based on the revolutionary GSX-R125. Meet the new lightweight king of the streets, the Suzuki GSX-S125. It has the best power-to-weight ratio and acceleration in the 125cm3 street sport class, plus nimble handling and great fuel economy. It also has exciting, modern, innovative bodywork, with traditional handlebars and a low seat height for a comfortable ride. Along with a multi-function LCD instrument and vertically stacked LED headlights in a stylish cowl. It is a dependable, comfortable, nimble motorcycle that also delivers genuine Suzuki high-performance. It is made to handle city traffic jams while commuting to school or work during the week. And it is also an exciting motorcycle ready for fun rides into the countryside—or even a track ride—on weekends. The GSX-S125 is a motorcycle that’s easy to ride. And it is easy to be proud of, with a genuine supersport engine and the latest technology,
plus high-quality fit and finish, and beautiful paint and graphics.
It started with the legendary GSX-R line, with more than a million sold worldwide. And the dedicated Suzuki engineers behind the GSX-R line take their responsibilities very seriously: Every GSX-R must be very light and best performing in its class, in an unbeatable package. Now Suzuki engineers have applied their expertise and design philosophy to an exciting new street sport 125cm3-class motorcycle, based on the revolutionary GSX-R125. Meet the new lightweight king of the streets, the Suzuki GSX-S125. It has the best power-to-weight ratio and acceleration in the 125cm3 street sport class, plus nimble handling and great fuel economy. It also has exciting, modern, innovative bodywork, with traditional handlebars and a low seat height for a comfortable ride. Along with a multi-function LCD instrument and vertically stacked LED headlights in a stylish cowl. It is a dependable, comfortable, nimble motorcycle that also delivers genuine Suzuki high-performance. It is made to handle city traffic jams while commuting to school or work during the week. And it is also an exciting motorcycle ready for fun rides into the countryside—or even a track ride—on weekends. The GSX-S125 is a motorcycle that’s easy to ride. And it is easy to be proud of, with a genuine supersport engine and the latest technology,
plus high-quality fit and finish, and beautiful paint and graphics.
Modern Backbone Frame and Chassis
The GSX-S125’s confidence-inspiring stability on the highway, nimble handling in turns, and easy
The GSX-S125 has exciting, aggressive styling that transforms it into a rolling work of motorcycle art. It starts at the front with a modern headlight cowl and instrument module, and continues with a sculpted fuel tank and extended upper side cowlings, plus a lower engine cowling. The tail section and side panels extend forward and reach underneath the fuel tank, unifying the design. And frame covers add distinction and substance to the overall look. The sleek, compact bodywork pieces not only look great, they are also lighter than the bodywork used by competitors, and make it easier for the rider to maneuver through traffic jams.
maneuverability through traffic start with a modern chassis. A steel-tube backbone frame combines optimal torsional rigidity with light weight. The wheelbase is 1,300mm with a curb weight of only 133 kilograms, and a seat height of just 785mm, making it easier to put both feet flat on the ground when stopped.
An Exciting and Aggressive Style
The GSX-S125 has exciting, aggressive styling that transforms it into a rolling work of motorcycle art. It starts at the front with a modern headlight cowl and instrument module, and continues with a sculpted fuel tank and extended upper side cowlings, plus a lower engine cowling. The tail section and side panels extend forward and reach underneath the fuel tank, unifying the design. And frame covers add distinction and substance to the overall look. The sleek, compact bodywork pieces not only look great, they are also lighter than the bodywork used by competitors, and make it easier for the rider to maneuver through traffic jams.
LED Lighting
Reflecting its GSX-R heritage, the GSX-S125 features vertically stacked LED headlights, with the low beam above the high beam, and position lights on each side of the headlight. The GSX-S125’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 125cm3 machines
The Science of Engine Design
There is a science to building high-performance engines, and the GSX-S125’s DOHC engine could be used in a university textbook as an example of how to make a lot of performance out of a very efficient and compact powerplant. The objective is combustion efficiency, optimal balance of the sporty engine character and fuel economy. There is a connection between the GSX-S125 and the race-proven four-cylinder GSX-R600 sold around the world, because the GSX-S125’s single cylinder is almost one-quarter of a GSX-R600. Although Suzuki engineers experimented with different bore and stroke figures to find the most efficient combination for the GSX-S125, the two engines both use an over-square design, with a larger bore and a shorter stroke, and have a similar bore x stroke ratio, 1.576:1 for the GSX-R600 and 1.505:1 for the GSX-S125. The GSX-S125 engine displaces an actual 125cm3 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 cylinder bore is plated with Suzuki’s own race-proven nickel-phosphorus-silicon-carbide bore coating known as SCEM (Suzuki Composite Electrochemical Material). An aluminum cylinder plated with SCEM weighs much less than an aluminum cylinder fitted with a conventional, pressed-in cast-iron liner, while also reducing friction and improving durability, ring seal, heat transfer and the engine’s ability to maintain consistent high-power output.
An effective liquid-cooling system with a large radiator helps keep the engine at the optimum temperature, producing consistent performance and maximizing fuel efficiency and mileage. The engine makes its high horsepower and reaches its generous torque, delivering strong, effective power across a broad rpm range. And the GSX-S125 comes with a smooth-shifting 6-speed transmission and an electric starter.
An effective liquid-cooling system with a large radiator helps keep the engine at the optimum temperature, producing consistent performance and maximizing fuel efficiency and mileage. The engine makes its high horsepower and reaches its generous torque, delivering strong, effective power across a broad rpm range. And the GSX-S125 comes with a smooth-shifting 6-speed transmission and an electric starter.