96 twin cam starts sometimes

I have a 96 twin cam with 125,000 miles It just started this problem, When you turn the key on, the motor will turn over but not start. Also there are no idiot lights on, on the dash.(brake airbag ses ) then I turn it on and off several times them all the lights come on and the car starts fine. I'm thinking it's the ignition switch but would like to check if there is anywhere else to look at first.