Hutch,
I have been trying to follow your direction here but take a look at my previously suggested JT sprockets site.
here is the stock GS550
http://www.jtsprockets.com/52.0.html?&L=0&sel_uid=4789&p=These are available in
Front sprocket available in: 13, 14, 15, 16, 17, 18 teeth
Rear sprocket available in: 33, 34, 39, 40, 41, 42, 43, 44, 45, 50 teeth
The stock 50 is found on
http://www.jtsprockets.com/61.0.html?&L=0&sel_artnr=JTR814,50If you want a 44 that also is stock for the following
http://www.jtsprockets.com/61.0.html?&L=0&sel_artnr=JTR814,44If you want to find any other tooth number and what it was stock on go to that last link and click on the dark bold tooth counts and that will take you to a listing of all suzuki's it was used on.
Actually here is the grand list will all stock listings for that 530 sprocket design.
http://www.jtsprockets.com/61.0.html?&L=0&sel_artnr=JTR814,34If you can't find a dealer let me know because I know I have at least one catalog at home with JT sprockets listed in it.
Lastly if you don't like these, Sprocket Secialists will make any tooth count you want in either the dreaded aluminum or good old steel.
Paul