I know I'm late to the party but figured I'd share this anyway for anyone searching:

http://gstwins.com/gsboard/index.php?topic=69046.0

hello guys , i have one question, i have 2006 suzuki gs500f , can i fit ol version carburetors on it , 2000 < ?

SJ-OldSkool,

Yes, I still have the carbs for sale.

They are $150 plus shipping.

Where are you located?

Thanks,

Trwhouse 

Hi Trw, do you still have the carbs? How much? Pm sent. Thanks

Just a note on hanging idle.

I had a 2001 and a 2007 GS500, both with the later carbs and both suffering the hanging idle problem, 3,000 rpm, or turn down the idle set screw and stall, turn idle screw back to original position, 3,000 rpm..

I found in both carbs that the throttle plates were fairly open, so I turned the throttle set screw until the throttle plates were almost closed. Then I cleaned out the carbs and sprayed cleaner through the pilot jet hole until it came out in the venturi, to be sure not blocked. Then on 2001 carbs, drilled pilot jet with .34mm drill (careful, don't snap the drill bit!); on 2007 carbs, replaced 17.5 jet with 20 jet. Set the mixture screws to 2 1/2 turns, maybe 2 3/4.

Both bikes idle very solid at about 1300 rpm, after FULL warmup. Warmup time is still near 5 minutes.

I did find a set but I wouldn't mind having another set as spares.

Did you sell it?

Hi, are you still looking for a set of these carbs?
Let me know, and thanks,
Trwhouse 

Patrick was a good fellow.  I still have parts I bought from him, still in their original shipping boxes.
So, did you ever sell this bike?
Best wishes,
Trwhouse