Re: CBR 900 (99) WONT START (COLD HERE)
If that happens again and you know your battery is good enough for a strong crank, open the throttle with the choke off while starting to purge the cylinders for 10 seconds. Much longer and the starter can get very hot.
When the throttle closes, there should be enough vacuum to cause remaining gas inside the cylinders to "fog." If it fogs too much, the fuel/air mixture will be saturated and no combustion will take place. Gasoline only combusts between a narrow range. If its too rich or too lean, no amount of hot spark will start it. Cracking the throttle a little while starting might find the sweet fuel/air ratio to get it started. This makes carbed bikes so much fun to start in the winter.