To most bikes that I have owned over the last 20 years or so I added a headlight modulator. When I bought my current ride, a 2016 Goldwing, the dealer said he will not even order them for me, and does not believe they work, and said the dealership had not installed one in several years. And this is a huge multi brand dealership. I always felt that it made a noticeable difference in the times that a car or truck turned left in front of me, which is why I am adding this mod now. Just wondering if this is even a controversial idea to the members of this forum. The only downside that I see to having this is that it might be annoying to cars in front of me, but I can live with that.