My bike backfired on me cranking it up yesterday at a local store. It blew air onto my left leg. Did not start. I went ahead and cranked it up. It would idle at 2000 rpm instead of 1000 rpm. It also ran like crap. Shut it off. Checked the vacuum lines and sure enough it had blown one off by the top from of the rear cylinder by the throttle bodies. Put the line back on. It cranked right up after that and rode it home. It might be worth checking around on it with a good flash light to see if anything looks out of place or cracked.
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.