What's the current condition of your air filter, what is your air filter maintenance schedule and habits, and what type of air filter is it (stock or otherwise)?
Did this problem with how the bike runs come on gradually, or all of a sudden?
Was the bike sitting for a period of time, or is the bike ridden often?
Have you done any other work to the bike just before this happened?
Are these new turn signal lights the type that do not use light bulbs?