[eff]

So you are not too far off from my year. Here is what I am running:

Bike year & model = 2004 DE250
Temperature (degF) = 35 - 50 degF
Elevation (feet) = Sea level to 1000 ft
Main jet = 178
Pilot jet = 48
Needle & notch = LTR -0 #4
Air screw setting = 2-2.5 turns out
Throttle valve/slide = #7


I'm not sure how the JD Blue compares to the LTR needle.

Here is a guy running a JD Blue:

Bike year & model = 2003 EC250
Temperature (degF) = 50-85
Elevation (feet) = 800ish
Main jet = 182
Pilot jet = 40
Needle & notch = JD Blue, 1 down from top (#4?)
Air screw setting = 2-1/2
Throttle valve/slide = #5

Results:
Runs clean all through range, doesn't have a big hit, just lots of good clean power. Idle is a little rough, depending on temp.