Easy & cheap way to mount a flashlight.
Here's an easy and cheap way to mount a flashlight to the handlebars of your MB. Use two tangential screw clamps (that's the technical name, but you may call them worm gear clamps, or hose clamps) as shown in the attached photos. The flashlight is clamped securely, but there's enough "flex" to adjust the beam to where you need it. The cost is only a few dollars.