supposedly they are equivalent needles. Why some bikes get the NOZ's and others get the N85's
is one of those great mysteries of life with KTM's.
N85A = NOZE ---> Richest
N85B = NOZF
N85C = NOZG
N85D = NOZH
N85E = NOZI ---> Leanest
I run the N85D in my 300EXC, which is about right. It came set up with a N85C, which was too rich.
My bike was delivered with a set of jets and the leaner N85D needle, which was kind of cool.
And while we're on the subject of carb tuning, there has been much discussion about changing to a
leaner slide. The Keihn carb comes with a #6 slide, which may be on the rich side. Many KTM
owners have switched to a #7 slide, but I have resisted. While I was using the stock exhaust, I
was tempted, but after I replaced the stock exhaust with an FMF pipe/spark arrestor combo, I
didn't see the need. The FMF Turbine Core is shorter than the stock spark arrestor, and it seems
like it is more free-flowing and doesn't get such a buildup of spooge. Here's what I'm running with
the FMF exhaust:
#6 slide, 172 main, 42 pilot, N85D with clip in #2 position from the top, air screw a couple of turns
out.
Here's what some guys were running with the #7 slide and stock exhaust (for the most part):
#7 slide, 175 main, 45 pilot, N85C with clip in #2 position from the top, air screw 1 3/4 turns out.
Either one probably works fine, but the #7 slide costs about $60. I'll stick with what I've got.
