2005 Suzuki GS500 factory manual

Right here!

http://www.repairmanual.com/motorcycles/2005/62/0/16848/14395

Little salty but well worth the money. The Clymer ones for the older GS500's should be ok being the engine and most other parts hasen't changed in years.

If you have some bike knowledge then they will be fairly easy to understand. The factory service manuals are written for their mechanics where a Haynes is written for the normal everyday guy wantin' to work on his bike, except my Haynes manual for my CB as it was written by a guy using the Queen's English using words like "prise" for pry and "in situ" for meaning in the bike. The factory manuals have specs for how to test things like coils and stators where the Haynes may not. If you want one for just basic maintance then the Haynes will be good for that. Like I said not much, if anything, has changed on the motor that I can see since they came out. Haynes and Clymers generally have about any spec or procedure that you would need to know but the factory one has anything you'll ever need to know.