I always carry when I ride. If one gets boxed in at an intersection and can't escape, its hard to lock the doors and bull your way out of a bad situation. There have been hijackings of motorcycles, particularly high end Harleys. The exposure that makes riding such fun also makes the rider an easier target. I usually carry a compact Glock, crossdraw. I am right handed and the pistol on the left side makes it easy to draw while straddling the bike. Also, the ability to get to it left handed means I can roll the throttle with my right hand and still get to my gun with the left. Being able to use the throttle to get away could be important. One can get out of a spot staying in first gear if needed...