Register
Sale!

Jet Needle x2 [for Carb Diaphragm Slide] – Hyosung GT125 GT125R GV250 GT250R GV125

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

Original price was: £20.00.Current price is: £9.99.

🛠️ ADJUSTABLE JET NEEDLE KIT (PAIR) // CUSTOM TUNING GROOVES

Unlock precise fuel tuning across your V-Twin engine. This kit features two extra adjustment slots compared to stock needles, making a fresh Hyosung carb jet needle set the absolute best way to dial in your mid-range power delivery on local roads.

  • Tuning // Two extra adjustment grooves let you alter the fuel clip height to match your custom exhaust or airbox setup.
  • Components // Supplied as a full rebuild pack with new needles, clips, springs, plastic guides, and spring seats.
  • Response // Cures flat spots and engine hesitation when you open up the throttle twist grip.
  • Hardware // Shipped as a complete pair containing 2x sets to completely refresh both internal carb blocks.
⚠️ NOTE: The large black rubber slider diaphragms are NOT supplied inside this hardware pack. Tap here if you need the Diaphragm Slides.
Secure Checkout via

Description

When the main black rubber throttle slides wear down, the center fuel rods often need a total swap out too. Sourcing this premium aftermarket Hyosung carb jet needle set is a massive step above standard factory service components. The added adjustment clip slots give you complete power over your fuel flow settings. This makes it incredibly straightforward to alter your fuel mix to match airflow updates like our high flow filter upgrades or fix an old rich running issue that drops performance. It is a vital kit for keeping your twin running smooth and getting the absolute most from your motor on local roads.

💎 FUEL MIXING HYOSUNG CARB JET NEEDLE SPECIFICATIONS

Two Extra Tuning SlotsAllows you to lift or drop the rod position easily to clear up engine flat spots. Complete Rebuild PackIncludes fresh steel clips, springs, seats, and plastic base spacers for a total refresh.
Cures Acceleration GapsMaintains a constant fuel taper flow as the slide moves up through the atomiser hole. True Factory BlueprintEngineered to drop straight into original slides to replace factory code: 13334HM8100.

📜 Confirmed Fitment Guide

Carburettor Engined V-Twin Groups: Drop-in sizing verified across the standard non-injected models listed below. See the diagram picture for component placement order.

  • Hyosung GT125 / GT125R Sport: Fits all traditional twin carb models.
  • Hyosung GT250 / GT250R Sport: Fits classic twin carb layouts up to 2007.
  • Hyosung GV125 / GV250 Aquila Cruiser: Fits all carburetted cruisers up to 2017.
📦 FULL ENGINE SET INCLUDED:

You will receive a complete matching pair of two (2x) needles inside this set to completely overhaul both internal chambers on your twin motor together.

💡 RECOMMENDED TUNING BUNDLE PAIRING: A fresh tuning pin always deserves a clean, air-tight housing to slide inside. To make certain your vacuum pressure stays completely steady across your rev range, pair these pins along with our brand new replacement Carburettor Diaphragm Slides. View Carburettor Spares here.

🔧 Install Tips

  • Start in the Dead Middle: If you are not completely sure which slot height fits your engine setup best, snap the round E-clip right into the center slot position (the third groove down from the top) to use as your base tuning mark.
  • Read Your Spark Plugs: Take your bike out for a steady run on local roads and pull your spark plugs afterwards to examine the tip color. A dark tan or chocolate brown look means your mix is perfectly balanced. Clipping the ring into the lowest bottom groove opens the fuel flow wide for the richest setting.
  • Seek Help If Stuck: Balancing fuel flow inside twin carb bodies requires patience and care. If you feel stuck balancing your sliders or setting your clip heights on the workbench, you can find a local garage or read up on common owner setups inside the community guides.
📧 HAVING TROUBLE BALANCING YOUR ENGINE MIXTURE SCREWS? If your exhaust is blowing black smoke or you aren’t sure how to stack the tiny springs and plastic washers inside the slide housing, you can upload a crisp photo of your open components on the forum to get an instant breakdown. For fast sales support, email us your question or if you want to check out full teardown tutorials, head straight to the forums.

Additional information

Weight 0.3 kg
Dimensions 10 × 10 × 2 cm

Reviews

There are no reviews yet.

Share Your Feedback

GARAGE PICKS // ADD TO BUILD


Independent Shop supplying ride enhancements and quality spares with fast dispatch. Need assistance? Access our workshop guides, manuals, tutorials or drop by the forums for troubleshooting help.