2006 rocket three classic misfire

I pulled my bike out. Had it running for a minute and warming up getting ready to take a ride and suddenly started Misfiring ignition was changed a year ago. Can’t find any loose wires. Everything seems fine. Was tuned up less than a year ago. Any ideas?

Of course it could be many things, but I'd check the small coil wires aren't loose (crimp and reinsert). Next, and probably more likely, would be cracked vacuum hoses or caps.