I guarantee you blew the airbox, mine did the same thing, after using throttle on cold start (insert stupid here). I ended up replacing with Freak kit.

'05 TBA, Freak/152.5 mains/48 pilots/Gutted Shotguns/AI/Custom rear hangers-Chain Guard/Sport signals/Ness Mirrors/Kury pegs/Driver's Backrest/LOTS OF CHROME!