| Component | Specification |
|---|---|
| Engine Oil | SAE 10W-40; JASO MA2 (3.2 L) |
| Front Tire | 120/70 ZR 17 (2.5 bar / 36 psi) |
| Rear Tire | 190/50 ZR 17 (2.9 bar / 42 psi) |
| Battery | YT12A-BS |
| Spark Plug | NGK CR9EIA-9 |
| Model Code | GSXS10GT/25 |
The Suzuki GSX-S 1000 GT represents a masterclass in platform evolution. While many modern sport-tourers have moved toward high-revving, short-stroke architectures, the GT is built around the legendary 999cc long-stroke engine derived from the 2005-2008 ‘K5’ GSX-R1000. This specific engineering choice provides the GT with a unique torque curve that is arguably the most linear and usable in the liter-class touring segment.
Engineering Overview
The GSXS10GT/25 utilizes the Suzuki Intelligent Ride System (SIRS), which integrates the Bi-directional Quick Shift System with a ride-by-wire electronic throttle. From a maintenance perspective, the inclusion of the Suzuki Easy Start System and Low RPM Assist reduces wear on the starter motor and clutch plates, though it necessitates a healthy battery (YT12A-BS) to maintain the sensitive electronic sensors.
Maintenance Essentials
Lubrication System
For the GSX-S 1000 GT, the lubrication system is critical for both cooling and gear protection. Suzuki specifies 3.2 liters of SAE 10W-40. To ensure the longevity of the wet-clutch system, the oil must meet JASO MA2 standards. Using non-MA2 rated oils can lead to clutch slippage under the high-torque loads this engine produces.
Ignition and Combustion
The use of NGK CR9EIA-9 Iridium spark plugs is non-negotiable for this model. These plugs are designed to handle the high-compression environment of the GSX-R derived cylinder head while providing consistent ignition across the wide powerband required for grand touring.
Chassis and Contact Patch
The handling dynamics of the GT are heavily dependent on tire pressure. Running the 190/50 ZR 17 rear at the factory-recommended 2.9 bar (42 psi) is essential when carrying luggage or a pillion to prevent carcass deformation and overheating. The 120/70 ZR 17 front should remain at 2.5 bar (36 psi) to maintain the precision of the twin-spar aluminum frame’s geometry.
Editor’s Verdict
The Suzuki GSX-S 1000 GT is a testament to the philosophy of ‘refinement over replacement.’ By pairing a bulletproof, historically significant engine with modern aerodynamics and a robust electronics suite, Suzuki has created a machine that is as reliable as it is exhilarating. For the owner, following the specific technical specs outlined above is the key to unlocking another 100,000 miles of the K5 legacy.