2011 EC250 with a PWK 38mm Air Striker 2 carb (Canadian bike). FMF Q stealth silencer, stock pipe, VForce 3 reeds, basically a bone stock bike up here.
Elevation: 2000-3000'
38 pilot jet (stock was 40)
172 main (stock was 180)
N8RH needle in the 4th clip
Air screw is 1.5-2 turns out depending on air temperature.
Plug was a golden tan when tested at 5 degrees celsius but might be a tad rich as the temperature warms up. Once the weather improves and it stops snowing I may drop the pilot to a 35 and see about moving the needle or going to another KTM needle. It seems the KTM jetting chart is pretty close, though because this is a 250 and with a 38mm carb, the jets need to be 1-2 steps richer. For a 300 an engine tuner said it could get away with the stock KTM250 jetting due to the increased air velocities of the bigger jug.
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