From what I have seen, most saws are designed with the bar and chain on the right side of the machine. When operating the chainsaw right handed, right hand on the throttle, left on the handle, the bar will clear your body in the event of a kickback. Not to mention the chain brake would be activated when the saw kicked back/up as your left wrist contacted the chain brake as it should. Operating the saw left handed, left hand on the throttle, right hand on the handle, puts you right in line with the bar if the chainsaw kicks back. Your right hand gripping the handle may also miss the chain brake activation in the event of a kick back. Just going off experience of watching my left handed brother initially grab a chainsaw.....left handed.