Description
The factory oil plug sits directly on the right-side clutch housing, serving as the main entry port where you pour fresh lubricant into the case. The standard original part is a flat piece utilizing an awkward, slotted ridge design that forces you to squeeze a pair of pliers onto the tab just to crack it open. This premium aftermarket Hyosung magnetic oil cap upgrade replaces that weak setup with a beautiful, hex-shaped billet aluminum bolt that unhinges easily with a regular workshop spanner. More importantly, it features an integrated high-strength magnetic tip extending directly into the engine oil passages. As your bike handles touring, daily riding, or long road trips, the core actively captures floating steel shavings shed by normal clutch plate friction and gear mesh. Trapping these metal bits takes the load off your filtration paper, ensuring your oil stays clean across your latest restoration project.
💎 CASING DRESS-UP ENGINE PLUG KIT HIGHLIGHTS
| Feature | Details |
| Magnetic Core | Catches circulating iron particles before they travel to vital crankshaft bearings and oil passages. |
| Hex Drive Head | Allows fast, damage-free removal with standard tools during regular oil-change maintenance intervals. |
| OEM References | Sized accurately to replace factory code: 09259-2000903S. |
📜 Confirmed Model Fitment
Hyosung Models: Fits the following models below only. Double-check your engine size before checking out.
- GT125 Naked Comet & GT125R / RC: 2003 to 2019 carburettor models only.
- GV125 Aquila Cruiser: 1998 to 2017 carburettor models only.
🔧 Installation Tips & Maintenance Guides
Installing this anodized cap is a simple, direct swap on your workbench. Follow these pro pointers to keep your engine safe:
- Scrub the Neck Casing Clean: Use a clean cloth to thoroughly wipe down the area around the filler opening before unbolting your old cap. This stops grit from dropping inside your open clutch housing.
- Pre-Lubricate Your Rubber Ring Seals: Smear a tiny film of fresh motor oil directly onto the O-ring before threading the plug into place. Lubricating the rubber ensures a plush seal and stops it from pinching or tearing.
- Check the Magnetic Core for Debris: Every time you pull the plug to top up fluids, look over the tip. Fine gray metal dust is normal wear, but finding large chunks means you need to look closer at your internals.
- Hand-Tighten Firmly Only: Screw the bolt down manually using your fingers first. Billet aluminum threads easily strip out soft engine covers if you over-tighten them with brutal tool force. A gentle nudge with a spanner is all it takes to lock it.
- 💡 Planning a comprehensive service swap? Review our simple community step-by-step guides: [View Oil Change Tutorial] or our [Clutch Replacement Guide].


















































Chris Newman –
Great for catching anything you don’t want in your oil , while giving another bit of bling factor to the bike 👌🤙