Carburettor Needle Acorn Nut [Carb Hollow Brass Screw] – Hyosung GT125R GV250 GT250R GV125

Description

When maintaining, cleaning, or overhauling the fuel system on your V-twin cruiser or sport bike, the smallest mechanical details matter most. This aftermarket needle acorn nut is a precision-cut hollow brass screw built explicitly to keep your main fuel slide needle locked down securely and positioned right. As your bike handles regular miles on local roads, these soft metal fasteners are highly prone to surface corrosion, white scaling, or rapid distortion. This item is rarely changed during minor tune-ups, but owners constantly damage the head slots due to the ultra-delicate brass nature of the metal. Sourcing a fresh Hyosung carb needle nut pattern copy is a smart move that guarantees a hassle-free service experience on your workbench across your latest restoration project.

This pattern copy fits flawlessly into the internal slides, working exactly like the original factory component. This specific hollow cap is arguably the single most delicate bolt inside the entire carburetor body—with only the low-speed pilot mixture screws coming a close second for soft metal vulnerability. Swapping out a distorted or mangled cap ensures your slider needle drops down straight into the emulsifier tube, blocking unmetered air and correcting the erratic idling or rich running problems that ruin fuel efficiency on everyday journeys.

💎 INDUCTION HARDWARE HYOSUNG CARB NEEDLE NUT OVERVIEW

📜 Confirmed Fitment Guide

🔧 Installation Tips

• Use Highly Gentle Hand Movements: Raw brass material is incredibly soft. Always start twisting the hollow cap manually inside the slide using your fingertips first to ensure it isn’t cross-threading. Do NOT overtighten or crank down hard with tools, or the head will twist off immediately.
• Flush the Internal Orifice Thoroughly: Blast the slider passages out with a mild solvent spray before dropping the new part home. Ensure the internal openings are completely clear of old, sticky fuel gum or scaling that can jam the threads.
• Inspect the Long Jet Needle Pin: While you have the brass acorn bolt removed on the bench, lift the fuel needle out. Check the tapered sides using a clean cloth to verify there are zero fine scuff marks or worn steps. If the pin body is grooved, a new nut cannot clear up mid-range performance bugs alone.