What kind of carb? On my carb bikes (S&S carbs) a cold start was a couple blips of the throttle, enricher on, and slowly kick through with ignition off once , then key on and kick her. On a warm motor kick it through once with key off and then try it. No choke or throttle. If no go crack the throttle just a "wee" bit. Try different variations of this to find your bikes happy place. If it doesn't start after a few kicks shut the key off and kick it through easy with the throttle held open. the try again with no throttle.