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K&N DNA BMC Air Filter + Upgrade Carb Jets Kit – Hyosung GT250R GT250

Estimated delivery dates: Sep 3, 2026 - Sep 10, 2026

£85.99

ðŸ 250CC PERFORMANCE AIR FILTER & JET KIT // BOLT-IN POWER UP

Breathe new life and torque into your V-Twin motor. This proven bundle pairs a premium EU-made performance filter with size-matched jets for optimum fueling plus stainless steel hardware freebies, making a new Hyosung 250 tuning kit layout the most effective way to eliminate lean flat spots on local roads.

  • Airflow // High-performance element increases cold air ingestion to build cleaner top-end power.
  • Jets // Set includes Main Jets (95 Front, 97.5 Rear) specifically calibrated to handle the added wind induction.
  • Hardware // Pack comes with 12x stainless steel bolts to replace easily stripped carb bowl and airbox screws.
  • Components // Supplied as a total package with 1x high-flow element, 2x fuel main jets, and replacement stainless bolts.

â° SPECIAL ORDER: This part is a special order from the factory. Please allow extra time for delivery to your door.

âš ï¸ BRAND UPDATE: K&N filters are permanently discontinued for this model. We now supply superior DNA (EU) or BMC (EU) alternatives which drop straight in and perform better.
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Description

The standard factory paper air elements on your bike are highly restrictive and degrade rapidly over months of weather exposure. Combined with the lean factory fuel settings, the standard setup leaves your motor choked for both air and fuel. This Stage 1 performance bundle addresses that slow maintenance reality by vastly expanding airflow pathways and correcting the air-fuel mixture right out of the box. The immediate result is smoother power delivery through the rev limits, much easier cold starting on damp mornings, and a snappier throttle response on local roads.

We use premium European-made DNA or BMC filters inside this kit due to their superior structural build quality, easily washable mesh design, and top-tier filtration capabilities. The included stainless hex hardware adds excellent rust protection and a clean polished look to your engine bay area during your intake rebuild. This provides an excellent one-time upgrade path since the old US imports have ended production.

💎 INDUCTION TUNING HYOSUNG 250 TUNING KIT SPECIFICATIONS

European High-Flow ElementWashable, reusable fabric mesh that flows significantly more air than basic paper. Calibrated Fuel Main JetsSize 95 for the front and 97.5 for the rear to protect against lean engine running.
Optimised Torque GainsBalances the fuel curve to add noticeable mid-range punch and smooth throttle lift. Rustproof Hex BoltsTwelve stainless screws to secure your bottom float bowls and airbox frame lips safely.

📜 Confirmed Fitment Guide

250cc Carburettor Model Group: Custom jet sizes are matched exclusively for the non-injected twin engine layouts noted below. See the diagram picture for airbox track routes.

  • Hyosung GT250 Comet Naked: Fits classic unfaired twin carb models.
  • Hyosung GT250R Sports: Fits faired twin carb models.
⌠WILL NOT FIT LATER INJECTION ENGINES:

  • EFI Fuel Injection: This will strictly not fit later electronic injection models. They do not use carbs.

Riding a Smaller Twin? If you are working on a 125cc bike instead, click here for the correct 125cc version.

💡 RECOMMENDED TUNING BUNDLE PAIRING: Deep-breathing fuel mixtures require a rock-solid electrical spark to burn cleanly inside your combustion chambers. Complete your performance overhaul task by swapping out your old plugs. Pair this package with our NGK Laser Spark Plugs to guarantee maximum combustion power and crisp acceleration. Browse Performance Kits here.

🔧 Install Tips

  • Accessing the Main Jet Slots: You will need to drop your bottom float bowls off to swap your stock fuel nozzles for our uprated sizes. If you aren’t sure how to separate the assemblies on your workbench, head straight to the forums to view our full jet install guide.
  • Check Internal Valve Seats: While you have the carb bowls unbolted and open for the jet swap, take a close look at your plastic float wings and metal needle pins to confirm everything is clean and free of sticky fuel varnish.
  • Lock the Airbox Seals Flat: Use our supplied unrustable stainless steel cover bolts when putting your air filter housing back together. Tighten them down evenly to guarantee an absolute air-tight seal around the airbox lip.
📧 NOT SURE HOW TO BALANCE YOUR IDLE SPEED SCREWS AFTER JETTING? If your engine is popping down local roads or your spark lines look white after fitting your high-flow element, you can upload a crisp photo of your carburetor settings on the forum to get instant tuning help. For fast sales support, email us your question or if you want to find simple tuning instructions, head straight to the forums.

Additional information

Weight 2 kg
Dimensions 20 × 25 × 20 cm

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