Slowly trying to set up my 426 for trails, dropped to a 13t front sprocket, keeping the 49 in the rear - a good change. Have not done the math yet, but allows me to go slow enough to plot my path with a pea brain. Also the blue wire mod, it actually starts now. Only remaining issue is idle speed. I cannot get a constant idle. Have not taken the carb off yet to clean it out, acts like the slide is sticking. Mixture seems good, burning 100LL (100 octane low lead av gas). Any thoughts?