Motorcycle Repair: starting problem, cold start, kawi

Question
I have a strange starting problem. I have a 1984 Kawi zx 900 ninja. When trying to cold start it will not start. The starter turns but the engine will not turn over. If you push start it and drive it for a while, then shut it down. As long as it is still warm it will start.
Any ideas ??? Your assistance is appreciated.

                Thanks

                Andrew

Answer
If you can push start the bike then it really sounds like you are not getting enough fuel for a cold start situation, adjust the airflow down on your carbs for a slight fix, to fix it for good you will want to replace the main jet in the carbs for the next size up.