After inspecting my spark plugs I noticed that the left cylinder was running more lean compared to the right. I decided to play with the mixture screw underneath.....one thing led to another and now the carbs are out of sync :grin: Does anyone know how many turns out the mixture screw should be on these carbies at factory? I have a 1998 Kawasaki ZZR250. I am also using a homemade carb sync tool but it is a little clumsy. Any help would be appreciated!