Starting diameters
 

Anyone out there who knows which starting diameters the following needles have: ( I am unable to drive to my garage today so can't measure...)

N1EF
NECW
JD_red (mine has 2 scribes)

The question I ask is because the bike sounds rich with the NECW in #3 on the first third of the rev range and I try to figure out why people constantly tell me it is a lean needle. It isn't in my opinion. It is not even lean at WOT running a 172 at 71 F.

You said rev range.

Always think throttle position.

I apologise, but still need the diameters :)

all i have is :
N1EG : (thickest diameter) 2.7mm, tip is 1.4mm
NECJ : 2.75mm tip is 1.4mm

what PJ are you running? have you tried 1 step leaner?

i seem to remember jakobi listing these in the jetting database

From someone clever on the forum,can't remember who posted it but super useful-
Nxxx needle diameters
D=2.685mm
E=2.695mm (JD Blue)
F=2.705mm
G= 2.715
H= 2.725
W/I=2.735 (JD Red)
J= 2.745
K=2.755

I posted that.. I didn't measure them though. Found in my studies and saved. Been posted a few times.

Thx to GG3 and Jakobi!

42. No, not yet but will give it a try once the weather has stabilized. Currently we have catastrophic weather starting with 12 degrees Celsius in the morning, 23 two hours later and 12 degrees 30 minutes later due to heavy thunderstorms. Humidity changing extremely all the time... :(

But I think, considering the JD_red worked well down low, that the 42 is also ok with the NECW as they have the same starting diameter of 2.735. Nevertheless it is worth a try as I found one difference:
with NECW I don't need to pull the choke and that indicates it may be too rich...

no need for a chocke with a cold engine, indeed indicates a rich situation.
if it's obvouisly running rich on the bottom, i'd try the 40PJ anyway.
does turning the airscrew have effect with the 42 PJ? if not go ahead and put the 40 and be amazed :D
put on a closed helmet ,rain coat and pants an go out testride :-p