decelaration

New 2011 FE 570 S here...love it. Runs like mad but... Backfiring/popping every time I let off and come into a turn or let the engine brake on a downhill. I'm running the Euro Comp Map as per the Dealer I bought it from. I'm thinking it's the smog device but don't know exactly how to test that...

When riding and closing the throttle i get a lot op popping from the exhaust. Motor is running fine on the throttle. Could this be a jetting problem? My jetsetting is: Main jet 185 Needle clip 5 (not sure what needle, guess standard) Idling jet 40 Starting jet 85 Idle air jet 100 Main...