883 Carb Problems

I have been having numerous carb problems with my wifes 2004 883. I bought it used about a month ago and it had a slight studder off of idle and an occasional carb fart. I tried a lot of things and eventually took it to the Harley Dealer and they said that they changed the slow jet from a 42 to a 45 and made some adjustments to the carb and that it is now 95% better. I rode the bike home and it did seem to ride a little better. A few days later I rode the bike and it was running fine. I filled it up with gas and about 2 miles down the rode from the gas station the bike started studdering really bad off of idle. It was so bad that I could not even ride the bike. I shut it off for a few minutes and the started it back up. I was then able to get it past the bad spot off of idle and make it home, but i had to keep the bike above idle. The bike will idle fine and it runs fine mid throttle to full throttle. I just runs really bad off of idle. If any one has any ideas for me to try I would greatly appreciate them. I have checked for intake leaks and there were none. I ran a tank of gas with Sea Foam in it. I have tried different jets, and I even took it to the dealer and they did not help me at all except they made my wallet lighter.


Thanks,
Jason

The bike sat over the winter according to the previous owner and yes the air cleaner and pipes are stock.

check the petcock screen, or did ya already?, debris in the jet or line from the tank where it loops/curves down, fuel valve working correct, and dirty carb, voltage to coil @ Idle ok, some thoughts