OVERVIEW
Designed to excite riders who value agility, power, and bold styling, the 2025 Suzuki GSX-8S is the latest addition to Suzuki’s renowned GSX-S series. This mid-size naked street bike packs a responsive 776cc DOHC parallel-twin engine with 270-degree crankshaft timing, ensuring a smooth, torque-rich ride. Enhanced by Suzuki’s Cross Balancer technology, the GSX-8S delivers the punch and precision riders demand, whether carving through twisty backroads, navigating the city, or cruising the open highway.
With its nimble chassis, advanced rider aids, and a sleek, mass-forward design, the GSX-8S is as functional as it is striking. Equipped with a 5-inch full-color TFT display and features like the Bi-directional Quick Shift system and traction control, it offers modern technology in a rider-focused package. Whether you're stepping up from a smaller bike or seeking something with a commanding street presence, the GSX-8S offers unmatched value and performance.
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KEY FEATURES
•A thoroughly modern street fighter, the 2025 GSX-8S arrives in Suzuki’s Glass Sparkle Black / Pearl Cosmic Blue, or a Metallic Matte Black No.
2paint scheme – each featuring unique logos that help identify the sport’s most exciting naked sportbike.
•The compact 776cc parallel-twin engine uses a 270-degree firing order for strong torque production and is equipped with Suzuki’s exclusive Cross Balancer system for smooth operation.
•The Suzuki Clutch Assist System (SCAS) smooths shifting and engine braking while shifting has never been easier with the Bi-directional Quick Shift system eliminates the need to use the clutch once you are rolling.
•The GSX-8S uses the Suzuki Intelligent Ride System (S.I.R.S.) with a three-mode Suzuki Drive Mode Selector and the four-mode Advanced Traction Control System* plus the popular Easy Start & Low RPM Assist systems.
•Designed around the compact parallel-twin engine and constructed with rugged steel pipe, the GSX-8S’s backbone style frame was developed to provide excellent straight-line stability, to contribute to nimble handling, and to perform well in the city, on twisty roads, and at highway speeds.
•High-quality KYB® suspension delivers controlled handling while ABS-equipped** NISSIN® radial-mounted 4-piston brake calipers up front grasp 310 mm dual, stainless steel brake rotors mounted to 17-inch, cast aluminum wheels.
•The GSX-8S features an upright riding position for superior comfort. The compact parallel engine allows the rider’s foot pegs to be set further forward, creating a reasonable sport riding position between the handlebar, footrests, and seat.
•The GSX-8S’ high-quality instrument panel instrument panel uses a full-color, 5-inch TFT screen with a scratch-resistant surface and an anti-reflective coating that improves visibility in bright light. Manually or automatically adjustable to ambient light, this TFT display keeps the rider fully aware of all the bike’s systems, settings, and real-time operating status.
•The front cowl houses a stacked pair of hexagonal headlights that employ the bright, Mono-focus LED light technology that provides the rider clear and bright illumination of the road ahead. On either side of the headlights are LED position lights that form narrow slits of bright illumination to the unique appearance of this Suzuki streetfighter.
ENGINE
•The new-generation 776cc parallel-twin DOHC engine delivers a superb balance of smooth controllable torque-rich power from low RPM and freely revs up to its peak power output.
•The 270-degree crankshaft configuration provides a similar, but more powerful experience as provided by the 90-degree V-twin engine used in the SV650 models.
•The spaced nature of the engine’s power pulses enhances traction and contributes to the strong power output at extremely low speeds, making the GSX-8S easy to maneuver in slow traffic or through tight corners.
•Suzuki Cross Balancer technology, patented by Suzuki and used for the first time on a production motorcycle, helps create a compact, lightweight design that delivers smooth operation.
•The pistons were developed using FEM (Finite Element Method) analysis to maximize strength and minimize weight.
•The 84mm cylinder bores inside the aluminum die-cast cylinders are plated using Suzuki’s SCEM process. Originally developed for racing and proven on the track, the SCEM cylinder promotes better heat dissipation, reduces friction, and provides a consistent wear resistant seal to the pistons’ rings.
•Dual, linked 42mm electronic throttle bodies use a newly configured Accelerator Position Sensor (APS) to provide an authentic response and feel to the rider’s throttle operation.
•The GSX-8S has two 10-hole, long-nose, 49 PSI (343kpa) high-
pressure-feed fuel injectors that maximize fuel atomization for
better combustion efficiency.
•The 6.0L air cleaner box shape and intake pipe lengths were created using computer-aided design to help maximize peak power output plus strong torque production at low engine speed. Positioned under the seat, the air box size and shape contribute to the
GSX-8S’s slim chassis.
•The GSX-8S has a distinctive short muffler design that produces an exciting and unique exhaust note. Most of the exhaust system is located under the chassis in an optimal, centralized location that benefits handling.
–The stainless-steel 2-into-1 exhaust system uses a high flow, dual-stage catalytic converter inside the mid-pipe that helps satisfy worldwide emissions standards.
–From the mid-pipe, the exhaust flows into an under-chassis chamber that has a short muffler design with an upswept end cap that slightly protrudes from the right side of the chassis.
•The digital ignition fires iridium-type spark plugs that increase spark strength and combustion efficiency, contributing to higher power, more linear throttle response, easier engine start-up, and a more stable idle. These quality components also last longer than conventional spark plugs.
•A large-capacity radiator effectively cools the parallel twin’s power output. A thermostatically controlled cooling fan helps stabilize coolant temperatures at low speed and stops.
•The unique cooling system inlet control thermostat valve helps main-tain consistent engine temperature and smooths the idle speed during warm-up. This stabilizes combustion and helps reduce emissions.
•Additional heat is removed from the engine via the use of a lightweight and compact liquid-cooled oil cooler (like those used on certain
GSX-R models).
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