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Carburettor Float Bowl Drain Screw Bolts – Hyosung GT125R GV250 GT250R GV125 GT125

Estimated delivery dates: Aug 28, 2026 - Aug 29, 2026

£4.99

🛠️ AVOID COSTLY REPAIRS // CARB DRAIN BOLT (125/250 Twins)

The ultimate inexpensive insurance to stop fuel leaks and blocked outlets. Old rotting casing hardware is notorious for seizing up solid and stripping out, making a fresh Hyosung carb drain screw the safest way to clear out dirty water traps during a maintenance project.

  • Genuine OEM // Features the exact factory tapered point required to ground flat and lock your drain channel 100% fuel-tight.
  • Utility // Makes draining away stale winter fuel or tracking down rough running issues on the bench a fast process.
  • Protection // Eliminates the common nightmare of drilling out a frozen brass head inside a cramped engine space.
  • In Stock // Ready for your next carb servicing. Supplied as a single (1x) individual original replacement fastener.
📦 PACK VALUE SPEC: This product listing is for one individual screw. Because your twin motor runs a dual setup, we highly suggest ordering a pair to upgrade both your front and rear chambers simultaneously.

In stock (can be backordered)

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Description

As your bike handles regular miles out on local roads, the lower carburettor float chambers are highly prone to gathering condensation water, fine sediment, and rusty grit directly from the petrol tank. Clearing your lower bowls is a critical part of winter storage prep and low-speed rough running diagnostics, but that task is only possible if the lower fastener actually unbolts! This genuine factory Hyosung carb drain screw replacement ensures you always have a clean, deep tool slot to work with, completely blocking the all-too-common stripped head headache during your next maintenance project.

Utilizing an authentic original equipment tapered bolt ensures that the fine internal fuel opening is sealed perfectly flush. It removes the need for applying excessive tool force, keeping the soft, delicate aluminum threads of your expensive carburetor body casting fully protected from stripping. This minor investment avoids the massive workshop expense of a full replacement assembly, making it a highly proactive upgrade for your latest restoration project.

💎 INDUCTION HARDWARE HYOSUNG CARB DRAIN SCREW SPECIFICATIONS

Factory Tapered TipPrecision ground needle nose shape that seals the lower dump hole metal-on-metal without leaks. Fast Sediment FlushAllows you to spin the screw out to drop dirty water or stale fuel in seconds on the bench.
True Factory BlueprintTurned accurately to match original Mikuni internal threads to replace factory code: 13380HG5100. Direct Drop-In SwapStandard thread tracking lines that screw straight into the lower bowl tower without modifications.

📜 Confirmed Fitment Guide

Hyosung Models: See diagram picture to see where the bolt goes to.

  • GT125 / GT125R / GT125P / GV125 Aquila: Carb Models up to 2017.
  • GT250 / GT250R / GV250 Aquila: All Carb Models across production years.
💡 REBUILD BUNDLE HARDWARE SUGGESTION: Balanced intake air pressures rely heavily on tight rubber boots. While you have your tools out on the bench to service your fuel tracks, inspect your intake clamps for scaling or surface rust. Complete your fuel system refresh task properly. Pair these new drain screws along with our stainless steel airbox clamps to seal your pathways tightly: View the Clamp Kit here.

🔧 Installation Tips

  • Utilize the Proper Hand Tools: Always make completely sure your flat screwdriver head fits the hardware slot perfectly snug. Using an incorrect or badly worn tool bit is the number one reason these brass fasteners cam out and round off on the workbench.
  • Only Work When Completely Cold: Never attempt to drain or unbolt components while the engine block or exhaust is warm. Wait until the machinery is completely bone-cold to remove fire risks and prevent the threads from binding tightly inside the casing.
  • Avoid Using Liquid Sealants or Tapes: These genuine original equipment screws utilize a precision-milled metal taper to stop leaking fuel. Never wrap the threads with PTFE plumbers tape or silicone glues—if a weep forms, back the hardware out and clear away any trapped debris from the internal seat instead.
📧 NOT SURE HOW TO UNCLOG A BLOCKED OVERFLOW SPIGOT LINE CLEANLY? If your drain bolt is completely frozen or you want to double-check your lower casing dimensions before unboxing your order, you can upload a crisp photo of your open drain holes on the forum to get instant help. For fast sales support, email us your question or if you want to swap quick tuning tips, head straight over to the forums.

Additional information

Weight 0.2 kg
Dimensions 0.8 × 0.8 × 1 cm

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