I know when I was dynoing my bike I noticed no performance difference with the 160 vs. the 155 main but on the dyno I was pretty rich. I don't remember the numbers anymore and down low I was way lean with the stock pilot. I was so lean with stock pilot that it didn't even register on the graph on the dyno. I had 160s in then. I now run 155 main and 48 pilot. I have stock springs and needles with no shims.

I learned all I need to know about life by killing smart people and eating their brains.
Eat right ,Exercise ,Stay fit, Die Anyway!