| Specification | Data |
|---|---|
| Production Years | 2017–2020 (EURO 4) |
| Engine Type | 124.4cc, 4-stroke, Liquid-cooled, DOHC |
| Engine Oil | SAE 10W-40 (JASO MA2) |
| Tire Size (F/R) | 90/80-17 / 130/70-17 |
| Battery | FTZ6V / YTZ6V |
| Spark Plug | NGK MR8E-9 (Gap: 0.8–0.9 mm) |
The Suzuki GSX-S 125 (DL32) represents a pinnacle of small-displacement engineering. A unique highlight of this machine is its 32mm throttle body—the largest in the 125cc class at the time of its release—which, combined with a high-performance 4-valve DOHC head, allows it to achieve the best power-to-weight ratio in its segment. This engineering focus provides a throttle response and high-RPM stability usually reserved for larger displacement sportbikes.
Technical Performance & Engineering
The DL32 chassis is designed for agility, weighing in at just 133kg (curb weight). The engine is tuned to deliver the maximum permissible 11kW for A1 license holders, but it does so with a sophisticated fuel injection system that monitors 6 sensors to optimize combustion. The result is a highly efficient EURO 4 compliant powerplant that doesn’t sacrifice the ‘GSX-R’ DNA.
Maintenance Specifications
1. Lubrication System
To maintain the high-revving nature of the GSX-S 125, oil quality is paramount. Use only high-quality synthetic or semi-synthetic oils meeting JASO MA2 standards to protect the wet clutch system.
- Oil Change Only: 1.3 Liters
- With Filter Change: 1.4 Liters
- Engine Overhaul: 1.5 Liters
2. Ignition & Electrical
The DL32 utilizes a specialized long-reach spark plug (NGK MR8E-9). Ensuring the gap is precisely 0.8–0.9 mm is critical for preventing high-RPM misfires. The electrical system is supported by a compact FTZ6V or YTZ6V battery; given the bike’s easy-start system, maintaining battery health is essential for the electronic fuel injection (EFI) initialization.
3. Chassis & Tires
Handling precision on the GSX-S 125 is highly sensitive to tire pressure. Maintaining the factory-recommended pressures is vital for both safety and tire longevity:
- Front (90/80-17): 2.0 bar (29 psi)
- Rear (130/70-17): 2.25 bar (33 psi)
MotoSpecsLab Verdict
The Suzuki GSX-S 125 (DL32) is more than a commuter; it is a precision-engineered entry point into the world of performance motorcycling. Following the strict maintenance intervals for valve clearances and oil changes will ensure this high-compression engine remains reliable well beyond the 50,000km mark.