My Victory has the 106 engine. I have read on here that cleaning can help. I personally would check for a vacuum leak first. Your bike is getting up there in years and rubber likes to crack. You can do something as simple as get a squirt bottle(old Windex bottle) full of water and spray down all the rubber intake rubber parts with the bike idling. If there is a crack the engine ought to change speed a little when it sucks the water into the crack(s). Then replace the cracked rubber piece if you find one. I have all ready had to do this on my Victory and it is a 2011 with 41K miles on it. Good luck. NOTE: If you try the squirt bottle with a more flammable liquid in it, the bike can catch fire, thus I recommend the water.
Buckeye, Arizona(USA) 2011 Victory Cross Roads, Black police bag guards, black engine guards, black handle bars, Triumph Tiger mirrors, Triumph hand grips, set speedo/tach back 5" , adjustable timing wheel, Lloyzz Fuel Programmer III & air filter. Modified exhaust, made stock into 2 into 1. MRA windshield, Rotated front fender forward,relocated ignition switch, Bad Ace Fuel Tank Risers, Fat front tire.