[hamilton]

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Bike year & model = 12 xc250
Temperature (degF) = 60F
Elevation (feet) = sea level
Main jet = 178
Pilot jet = 42
Needle & notch = JD blue needle clip#3
Air screw setting = 1 1/4 out
Throttle valve/slide = 6.5 slide

Results: Carb AS 1 38mm, 40-1 pre-mix, engine mods, FMF gnarly pipe and check point power valve cover.
This setting has taken me a while, think I've tried about every suggested needle on this site. Needed to change slide to get the results I wanted. Nice smooth,strong power from bottom to top.
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