I used mine on my previous BCS, a 605, with a round welding magnet so it could be moved to the front of the engine or on the steel handle support. I used it primarily as a headlight while using my sulky and trailer, so the engine was out front. Now that I have a 853 with plastic covering the handle support, I need a new mounting point. I also intend to use it for snow plowing or blowing, so an engine mount won't work since it will be to the rear. I thought about mounting a piece of flat stock wood or metal between the handle bars close to the pivot point with pipe clamps holding the flat stock to the handles, and then mount the light to that. But I found these mounts
Amazon.com: Nilight LED Light Bar Mounting Bracket Kit LED Off-Road Light Horizontal Bar Tube Clamp Roof Roll Cage Holder,2 years Warranty: Automotive under the same manufacturer as the lights I listed above. I think they will work perfect for a handle bar mount on my BCS.