bike dies when i shut off choke??

i have an 81 kz550c with those TK carbs on it, just rebuilt them and not when i start it up with the choke fully on it runs fine, but when i shut the choke off the bike starts 2 bogg down and die instantly?? anyone now on wats up with it?? do i have 2 turn up the idle on it??? need help

You do let the engine warm up properly? Give it a minute or two t warm up before shutting off the choke. There´s also possibility to shut it little by little. This is needed when bike starts to rev up after starting. I try to keep revs around 2-3k when warming up.

If the bike is indeed warm and won't run off choke, this is a sure sign that the pilot circuit is clogged or the pilot jets are in need of replacement (you can't clean them very well).

i let the bike warm up enough with the choke fully on and when i turn it off it starts 2 bogg down and die. is it suxin in 2 much air threw my filters? i have those emgo ones from Z1 would that be it??

Warm up enough? Ride the bike and then it´s warm/hot. Mine won´t idle too well untill it´s completely warm. You cannot adjust idle or make any judgements untill the engine and carbs are completely warm/hot. These are old bikes so if ya compare with some friends newer bikes they do operate differently. My bro has a ´07 ZX-10R and cold starting that one is piece of cake compared to my ´83 ELR.

My point is: give it time, don´t rush it. If you shut down choke when engine barely starts to idle then it ain´t warm yet. It´s warm when revs go up and then you slowly/gradually shut off choke till it´s completely warm.

I found that when I, and others, have rebuilt carbs, the thought is that "this means that they will be free of all contaminants". No offense, I re-built mine twice in a row. I thought that I had it clean enough, but I didn't.

I used a coffee can and carb cleaner like I did on my dirt bikes as a kid. But when I got it together again the first time, it was still clogged up. I guess it depends on the method and tools you have at your disposal.

I wonder if there is still clogging issues with your pilot system as wiredgeorge suggested.

What did you do to clean out your carbs while rebuilding them?

i used a bunch of carb cleaner, blew everything out with air compresser( gently though) and put them back 2gether with new rebuild kits. could it be that its suxin in 2 much air from my emgo air filter? and i know these style bikes are different from my buddys bikes they all operate differently. wat could it be??

like others here,i'm guessing clogged pilot jet or jets.take your carbs off.[even a rookie can do this-easy on vintage bikes],Remove float bowls,take out pilot jets and clean'em.get some good injector cleaner/gumout whatever to rid the jets/carbs of varnish.reinstall.When winter rolls around,empty your tank and drain float bowls so this won't happen again.
later buddy