Hi I dropped a look with a AI file.
I get for my own a space all around the graphic. But in fact, it depends on the placing options of the place dialog box. If I set placing options to "graphic", I have no more extra spaces.
Bad news is that with the JS place command, it seems that you can just ask for displaying or not the place dialog box but not set the options from this point.
I don't know if it's the answer you wait. However, if it's just the frame that is too wide regarding to the graphic, you can use
//myContainer is the parent container of your graphic
Hope it helps