I am 100% in agreement with
@RossKean on his opinion about headlight modulators. My (new to me) '06 came with a one, and that is the very first farkle I removed as soon as I got the bike home after buying it. I get annoyed at seeing constant flashing high beams (at me) from motorcycles whether I am in my car or on my bike. What message does a flashing high beam mean to other drivers on the road anyway? Say that you want to change lanes on a highway, and glance in your mirrors for a couple of seconds to see if the lane is clear next to you, and if it is safe for you to make the lane change. You see a flash of the high beam from a bike in your mirror. What does that mean to you? Is it "all clear, I see your blinkers, come in to my lane" or "don't you dare come in to my lane, I am here!!!"? WTF? (As a common practice, if I flash my headlight at a truck that just passed me, it means to him "go ahead, it is safe for you to come back into the lane I am in." - is that the message you want to always send?). If you want to make yourself more visible, then a better option is to add auxiliary lights to your bike as RossKean suggested. For one, they are very effective in elevating your presence to other drivers. For two, they eliminate the ambiguity whether a car is coming with a burned out headlight, or a motorcycle is on the road heading your way.