Keihin PWK needle jet size? (not the needle it self)

[David v]

Hi there!

I?m just curious... I fitted a NEDJ needle instead of the standard N1EF in my AS2 in the 2011 Gas Gas EC300, and by eye, I could not tell the two apart. Measuring the diameter in every 5:th mm along the length gave this result in millimeters, starting at the thick part:

Edit: Got the 2.91 figure from Erhard and by that calculated the diffecence in gap where the fuel flows between seat / needle and added to the table.

N1EF NEDJ Diff (area in fuel gap)
2.70 2.74 0,04 (19.4% smaller)
2.69 2.73 0,04 (18.5% smaller)
2.69 2.73 0,04 (18.5% smaller)
2.64 2.65 0,01 (3.7% smaller)
2.55 2.57 0,02 (5.4% smaller)
2.41 2.43 0,02 (3.7% smaller)
2.28 2.29 0,01 (1.4% smaller)
2.07 2.10 0,03 (3.0% smaller)
1.79 1.85 0,06 (4.2% smaller)
1.53 1.57 0,04 (2.0% smaller)

At idle or very small throttle openings the difference is only 0.04 mm and that is a pretty darn small difference! Does anyone know the diameter of the hole that the needel sticks in to? It would be interesting to calulate the area difference.

Cheers!
/David