For what it's worth here's my cold start method. 1. Lay bike over until gas runs out the overflow. 2. Put bike in second gear and rock back and fourth to get some fuel in the cylinder. 3. Pull choke up. 4. Get all 240lbs of me in a downward motion on the kick starter. Generally works on the first or second kick.
I believe the most important thing is to get some fuel in the cylinder.