I'm with KevinX on this one... they are not "chokes" they are "enrichers". Chokes control air flow... enrichers control fuel flow. Once you have started a bike with an enricher, you should close the enricher to half way... and when you take off close the enricher all the way and use the throttle to control fuel flow and idle... if you can do this then you will no longer have an enrichment problem. As Kevinx said, you are WAY over rich on start up... I'll give good odds that your plugs are fouled and your throttle bodies need a good cleaning. Do not despair... this problem has an easy fix and hasn't really damaged anything on the bike. Just clean your fuel and ignition systems and learn a new and proper way to use the enricher.
2013 Indian Vintage Chief FE... #7 of 25
2011 Victory Vision Tour Premium...