fuel tank bubbling??
 

give my 750ss a decent ride, stop, and can hear quite load bubbling in the tank when still warm but turned off?? anybody else had this? know what it is?

Could be the tank breather,does it stop if you open the cap?
Is the bike carbed or i.e?

uh-oh, sounds like you've awoken the desmo sprites. They live in your tank. Haven't you heard about them? Small fellows they are, known to nibble through rubber drain tubes..:)