the 09 banshee is already out over here and it's not a 4stroke.
in that link it's a pic of the 09 2STROKE banshee,
it says it's a single cylinder but that one cylinder has the same bore and stroke as the current banshee,
twin 26mm carbs,
premix??
i think they accidentally mashed the spec sheet from a 4poke with the banshee