The stock needle is too rich for the new engines and AS2 carbs. Gas Gas has changed a lot of the bike over the last 10 years but somehow still thinks the same jetting is good enough.
In saying that, even with what I would typically run on my 2010 model, I am finding doesn't quite work on the 2013 even though the engines are setup very similarly. Even running at what I would consider to be quite lean on the needle position I'm getting a bit of spooge although it could just be burning off excess as the last ride where I chugged around a lot I had it dripping from the silencer/pipe join down onto the swingarm. I'ma blame that 4 stroke can! Q stealth spooge trap.
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