You have put on pipes that pull out more than the injection system is putting thus have a lean condition.Check your plugs and I would bet they are almost white.I would find a good tuner and get it checked out.I have never found a good Polaris/Vic dealer that did good mods or tuning even on ATVs let alone on a FI bike.
2011 Cross Country 2007 Harley Street Bob V&H Big Radius pipes Stage one breather
1972 FLH (been through 3 wives and still loves me)
1976 Jeep CJ5 my orange turd
2004 V92TC GONE