IIRC, the reg allows either the high or low beam to be modulated, so it makes sense use it on the high beam only. Although when I wired in my modulator I didn't want to go through the extra hassle of wiring it to modulate the high beam only since we have a shutter system. I use a switch on the dash to turn it on and off as needed. And of course, it automatically turns off at night.
Kisan has a modulator that works on LED headlights. Not sure if they have a plug and play harness for the Spyder though. I'm sure they do for the GL1800.
You may not want to believe it but that CAN be true. Our brains do the seeing. Our eyes only collect the data that the brain deciphers. When you turn your head your brain sees the image in frames, like an old fashioned movie sequence. If your head is turning fast enough your brain may not see a slice of the image in between frames. A narrow object like a bicycle or a motorcycle can often fit into the gap between frames so the brain does not see it. The other physiological characteristic our brain exhibits is to discard background information that is static in order to focus on the active parts of the image. A motorcycle approaching a motorist from the side very possibly will look like a stationary object slowly increasing in size so the brain discards that part of the image. That is why a modulator works. The brain tends to focus on motion and a modulator presents an image in motion. You could try weaving back and force across the lane if you see a car waiting to turn onto the road in front of you. Your weaving is motion that attracts the brain's attention.
Correct. F3 uses a dual filament H4 bulb.
