Well my 2002 banshee is idling to high, i got fmf gold series header pipes. Fmf power core II silencer, and i adjusted the left carb neddle up one to make it run it wasnt moven at all through the whole throttle the needle wasnt should i move the need e back down?... To make it idle lower?...

 

You need to move both the needle the same, or you will fry a piston.