wheatonFJR
...
Did you notice ANY affect on handling at all?I actually was installing some 55w HIDs with big ballasts so I used that spot for those as well as try the battery lower. I went back to halogens and put the battery back up there.The ES has a control box in the bottom of that storage location. Not sure a stock battery would fit.I relocated my stock battery underneath the seat. It fits perfect horizontally in the front compartment. I moved it back to the stock location later because I wanted the storage space back and I think the bike felt better balanced with the battery back up front... I know, weird right?
Either way, it's easily doable if you're good with running some wires around.
Why did you move it in the first place? A handling experiment as suggest by the OP?