I am curious about the fact that both units act the same on start up, how does the bike run when it is warmed up? Starts easy? these are cold blooded bikes. I never run my bike with the choke on. First run of the day i know it will take a good 5 minutes to warm up enough to run without the choke. Have you messed with the air/fuel ratio at all?

2007 Speedmaster and miss it! 2013 T-Bird Storm and Luvin it! Catching a yellow jacket in your shirt at 70 mph can double your vocabulary