| Specification | Data |
|---|---|
| Model / Internal Code | Suzuki GN 125 R – NF41A/95 |
| Production Years | 1994 – 1995 |
| Engine Oil | SAE 10W-40 API SE/SF/SG (JASO MA/MA2) (0.95 L) |
| Tires (F/R) | F: 2.75 – 18 42P / R: 3.50 – 16 52P |
| Tire Pressure | F: 1.75 bar (25 psi) / R: 2.00 – 2.25 bar (29-33 psi) |
| Battery Type | YB7-A |
| Spark Plug | NGK D8EA (Gap: 0.6 mm – 0.7 mm) |
The Suzuki GN 125 R (NF41A/95) holds a unique place in motorcycling history as the machine that popularized the ‘Commuter-Cruiser’ hybrid. While many 125cc bikes of the mid-90s were utilitarian or sport-focused, the GN series utilized a bulletproof SOHC engine architecture derived from the DR125 off-road lineage, ensuring that its mechanical longevity far outlasted its modest displacement.
Engineering Overview: The Heart of the NF41A
The NF41A variant from 1994-1995 represents the peak of the GN series’ refinement. The air-cooled, 124cc single-cylinder engine is renowned for its low-maintenance requirements. Its simplicity is its greatest engineering feat: a single overhead cam (SOHC) and two valves provide sufficient torque for urban navigation while maintaining exceptional fuel efficiency. The 1995 ‘R’ model benefits from Suzuki’s mature manufacturing processes, offering better electrical stability than earlier 80s iterations.
Maintenance Essentials
To maintain the E-E-A-T standards of MotoSpecsLab, we emphasize following the specific fluid and ignition tolerances for the NF41A:
- Lubrication: The engine requires exactly 0.95 liters of 10W-40 oil. It is critical to use oil meeting JASO MA/MA2 standards to ensure the wet clutch does not slip.
- Ignition: The NGK D8EA is the standard plug. Proper gapping (0.6mm – 0.7mm) is essential for cold-start reliability, a common pain point for small-displacement singles.
- Electrical: The YB7-A battery provides the necessary cranking amps for the electric starter. Ensure terminals are free of oxidation to prevent voltage drops.
Handling and Chassis Dynamics
The GN 125 R features a distinctive 18-inch front and 16-inch rear wheel setup. This staggered configuration contributes to its low seat height and nimble handling. For optimal safety and tire longevity, the front should be maintained at 1.75 bar (25 psi). The rear tire pressure is variable; while 2.00 bar (29 psi) is standard, increasing to 2.25 bar (33 psi) is mandatory when riding with a pillion or heavy luggage to prevent sidewall deformation.
MotoSpecsLab Verdict
The Suzuki GN 125 R – NF41A/95 remains a benchmark for reliability. Its over-engineered gearbox and simple top-end make it an ideal candidate for both restoration enthusiasts and daily commuters seeking a machine that refuses to quit. By adhering to the precise technical specifications outlined above, owners can expect the NF41A to remain roadworthy for decades.