lots of dif. ideas on mix i have been running a 50:1 mix according to directions on package of the 2 cycle oil ive been using.havnt noticed any problems other then idle,one bike idles to high other wont hold idle,thought maybe the one that wont hold idle, carb air leak.but could this be result of the mix on the other?stock carbs one z-80 too high other pk 80 no idle,screw all the way in.