The quickest way I know to get an engine to kick back when you start it is to have the throttle all the way open. That'll work to bust you up almost every time. Leave the throttle closed and only open the throttle trim for starting. Choke or no choke. Flooding the engine is the second quickest way to get a kick back.

You can download all the timing proceedures for a CH ignition, along with a copy of the timing wheel, at the CH website.