Kayfun – What is it in Vaping?

Definition

A Kayfun is a high-end rebuildable tank atomiser (RTA) designed for mouth-to-lung (MTL) vaping. Originally engineered in Germany, it combines the flavour purity of an RDA with the convenience of a tank, holding 2–4 mL of e-liquid while allowing users to build and wick their own Kanthal Wire coils. Airflow is drawn from below the coil, through a narrow chimney, producing a tight draw similar to a cigarette. The Kayfun’s purpose is to deliver exceptional flavour at low-to-moderate power (8–20 W) with minimal leakage, making it a favourite among Australian vapers who value precision and longevity over clouds.

Technical Details

The Kayfun uses a post-less or single-post deck secured by a knurled design top screw, accepting 2.5–3 mm inner-diameter coils. Juice reaches the deck through two tiny vacuum-controlled channels; negative pressure created when you inhale prevents flooding. Standard 510 threading and a 22 mm base allow it to sit flush on most regulated tube or box kits. Variants include the Kayfun Lite (simple airflow, 2 mL), Kayfun Prime (tighter MTL, 2 mL), and Kayfun 5² (larger 4 mL tank, optional DL insert). All models use PEEK or PSU insulators rated for 200 °C and can be disassembled without draining the tank.

Usage & Tips

  • Wick with thin Scottish-roll cotton; tails should just touch the juice channels—too much causes dry hits, too little leaks.
  • Start at 10 W with 26 ga Kanthal, 1.0 Ω; increase 0.5 W at a time until flavour peaks.
  • If gurgling occurs, invert the tank and blow gently through the drip-tip while firing for 1 s to clear excess juice.
  • Always close the airflow when refilling via the top-fill port to maintain vacuum and prevent seepage on hot Australian days.

History & Context

Designed by SvoeMesto in 2012, the Kayfun set the gold standard for flavour-focused RTAs before sub-ohm culture exploded. Its success inspired countless clones, pushing the industry toward tighter airflow and single-coil efficiency that still influences modern MTL tanks across Australia today.

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