2014 V7 Special ... suddenly doesn't want to start and idle. Upon starting, revs go to 2000 without any throttle, then bike dies. Repeatedly. Only way I can get it going is to blip the throttle between 2000 and 4000 repeatedly. Once up to cruise, it runs normally. When hot, it will idle but fast and a bit rough. The only thing I did between the bike running fine and this malaise happened was to refuel with mid grade gas. Well once or twice in the past it has died while cornering at slow speed. I checked wiring and don't see any problem. Prior owner told me not to rev engine when cold as this "confuses the ECU". Have not had to, until now. Is this an injector problem? Perhaps that tank of gas was bad? It cannot be the fuel filter as it would cough at cruise in that case. I suppose it could be plugs but again, why do the plugs fire just fine at cruise? If it were a carb bike I would say the idle mixture needs an adjustment, or the idle jet is blocked. But it's not.