Getting Really Frustrated Now

[RoamingBison]

I just finished a carb cleaning/rebuild and petcock replacement on my 1980 GS550 yesterday. I could not get the bike started for the first time until I pulled the air cleaner and shot a bit of carb and choke cleaner into the intake to prime 'er up. I guess that the starter just couldn't pull enough air through the carbs to get gas started through all the passages, but a few seconds of running fired her right up. Without the carb cleaner helping out I ran a fully charged battery almost dead trying to start it with no results.

[northwoods]

Thanks to all for your help, looks like the throttle cable was keeping the butterflies jacked open so that it wouldn't start. After disconnecting the cable and fully choking it, it fired right up. I idled it for about 5 minutes and then tried starting it later but no go. I think that my tank is way too rusty. So I'll pull the carbs one more time, clean them all up again and then coat the tank and try again.