Description
Keeping your intake system running clean and smooth is absolutely essential for achieving a crisp throttle response, proper fuel efficiency, and balanced engine performance. This standard replacement paper air filter element is designed specifically for early cruiser lines. The slow maintenance reality is that a blocked or heavily loaded paper element disrupts your air-fuel ratio, forcing your V-twin motor to pull harder against air restriction on the intake stroke. This results in sluggish throttle pick-up, rough running, and lazy fuel economy. Swapping your old element for this high-quality Hyosung GV125 air filter is a straightforward maintenance task that brings your machine back to life during your ongoing restoration project.
This aftermarket element delivers factory-match filtration without any fancy or complicated changes to your bike setup. It provides the exact filtration micron levels required to protect your internal valves and carbs from road contamination, ensuring your engine runs cooler and lasts significantly longer on everyday rides.
💎 INTAKE FILTRATION HYOSUNG GV125 AIR FILTER SPECIFICATIONS
| Unrestricted BreathingOptimizes the air-fuel mixture to remove soggy acceleration patterns and rich exhaust smoke. | Protects Cylinder BoresFilters out fine abrasive road dust particles before they can score your cylinder walls. |
| True Factory BlueprintSized accurately to lock flat into the housing to replace factory codes: 13780HR8400 or 13780HG5104. | Fuss-Free Drop InStandard dry paper mesh design that fits right into your original box without modifications. |
📜 Confirmed Fitment Guide
What Model? What Year: Sizing is verified strictly for the standard cruiser housing layouts noted below. See the diagram picture for seating alignments.
- GV125 Aquila / Mirage: Carb models from 2000 to 2017 only.
- GV250 Aquila / Mirage: Carb models and early fuel injection models from 2001 to 2017 only.
This hardware replaces older filter shapes matching original references 13780SG5100 and 13780SG5100SVC. This item will strictly NOT fit the 2018 to 2030 liquid-cooled GV125-S Bobber EFi or newer GV250-DR models.
🔧 Install Tips
- Wipe Out the Housing First: Use a clean damp cloth to thoroughly wipe out any loose road dirt, moisture, or blow-by oil residue from the bottom of your airbox floor before you drop the new element in. This stops loose debris from flying directly into your carbs throats.
- Check Your Outer Rubber Seating: Take your time to verify that the rectangular outer rubber border lip sits completely square and flat inside the airbox track before fastening your cover plate bolts. Any uneven gaps will create a whistle and allow dirty air to bypass the filter paper.
- Track Your Routine Service Intervals: A safe maintenance interval for standard paper filters is roughly every 8,000 to 12,000 miles. If you commute regularly through high-pollution urban areas or dusty country tracks, inspect the paper pleats much sooner.
- Leave the Paper Dry: This component is a factory-match dry paper element. Do NOT apply tacky racing air filter oils or sticky spray lubricants onto the surface or you will completely choke the fine paper breathing pores.












David –
Fitted yesterday, seems to be working well,
Delivery by royal mail arrived on time,
Very well packaged with other items ordered,
Very pleased