freaking oneida wants almost 500 for a second gen gas tank. can't find any yellow's on ebay. Would a gsxr tank work with a sv650s second gen? Is yes, does the yellow of a 2004 match up with the yellow of a 2004 sv650s?
No technical/specific knowledge or first hand experience, but I'd say no a is a good place to start. Different frames, different mounting, different engines underneath, etc etc etc. I'm sure someone could jerry-rig it, but definitely not a plug and play.