So I'm showing off my Spanish spelling skills. Ain'tcha impressed, guys? :wink:
The GS850G, GS1000G, and the GS1100G or GK are basically the same bike, on the same frame. They all share the same virtues. If you can find one in good shape, buy it. It's that simple.
One "member" of this group, Robert Young, has his fully dressed GS1100G for sale. He lives in California, which is a long way from your home, but it's worth a shot. Look up the "for sale" ads in these forums.
Suggestions, and these are based on personal opinion, with which some may disagree. Have never owned a chain-driven GS, so this pertains to the large shafties. 16 years on four 850's and now an 1100GK have given me some experience:
1. Stay away from the "L" cruiser models. Uncomfortable seat, small gas tank, unnatural handlebars -- form against function. Stick to the standard models or the touring GK.
2. Avoid the 79 GS850GN. It has points and very outdated slide carbs. Also, a very weak stator. Poorer performance and gas mileage. I had one for two riding seasons -- my least favorite GS. Best years for GS850Gs and GS1100G's are 1982 and 83. Suzuki put it all together those years. The 82, 83, or 84 GS1100GK touring models are rarer, but that factory touring fairing and lowers is first rate. A 1980 or 81 GS1000G is also scarce, but an excellent bike.
3. The GS1100G or GK is slightly better for long-distance interstate riding than the 850's. Same acceleration as on the 850, but more top end. This is important when traveling for any length of time on the interstates, trying to keep up with trucks doing 75 to 90 mph. The 850 is stressed out (or the high-frequency engine noises will stress you out).
4. Once you find one, overhaul the carburetors and clean them out thoroughly in a cleaning fluid bath. Then replace all o-rings, gaskets, float valves, etc. The carbs will be dirty and clogged, chances are.
5. Keep the battery charged all the time. This will prevent the stator from working harder than it should. Keep the battery on the Battery Tender, especially during the winter months. Check out all connections; chances are they're dirty and will cause much electrical resistance, and therefore heat, and therefore failure.
Go to these sites for more information about owner experiences. The first one is on this site, written by me, on my acquisition of the GK. The second one is a short history of the GS1100G, the best standard bike ever made.
http://www.thegsresources.com/stories/gs_lowincometouring.htm
http://www.geocities.com/Colosseum/4884/suzi1.html
Nick