Shipped settings are 4.5, 4.5, 0. The first pot is the one you will need to focus on. I would start by riding the bike at stock settings and then check the plugs. Adjust in half increments. The last pot is only adjusted when an air kit (not just replacement air filter) is bolted on. Plugging the fresh air hose coming in the right side air box will have some effect on decreasing popping also. I would use the shipped settings as a starting point rather than trying to copy someone else's settings. My settings are 4.9 (just a hair under 5.0)4.5, 3.5 My mods, Cobra slip ons, thunder air kit 51010, air temp sensor relocated to neck, cobra fi2000r.
2011 Black Vaquero
V&H Slips, Thunder Stock Air, Cobra Fi2000r