Needle PWK

Needle PWK

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  • 100450 (GJH)
  • 100451 (LJH)
  • 100452 (JJH)
  • 100453 (JJF)
  • 100454 (JJK)
5 grams


Fits any Keihin PWK-type carb. (Not Mikuni.) No clip included.

JJH comes with our carbs already.

The three letters refer to different aspects of the needle. In turn you have:

  1. Taper: most effective at 1/2 to 3/4 throttle.
  2. Length/clip position: most effective at 1/4 to 1/2 throttle.
  3. Diameter: most effective 1/8 to 1/4 throttle.

Higher taper letters are richer; for diameter and length, higher letters are leaner.

For example, going off a standard JJH needle (our old N80F needle was close), and comparing with our other needles:

  • GJH: leaner taper, so leaner at ½-¾ throttle.
  • LJH: richer taper, so richer at ½-¾ throttle.
  • JJK: leaner diameter, so leaner towards ¼ throttle.
  • JJF: richer diameter, so richer towards ¼ throttle.

For a full chart, see our tuning page.

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