Reviving this zombie thread, I just did this yesterday. That rubber bit didn't work as advertised (and it's nowhere near the wear line), lifted the rear wheel off the ground @ about 30mph. Luckily I was able to recover (clutch wobble brake wobble panic wobble), but not before my instincts shot my foot down to steady the bike before my brain stuck it back onto the footpeg. Glad for those $300 boots now I am, but my big toe is sore.
My replacement headlight has a blue indicator bulb on the housing. I think I'm gonna wire a switch to the stand and the high-beam indicator on the regular cluster with a fast flasher. That should both get my attention and it will be obvious it's no longer a high-beam indicator.
1974 CB125S (purchased 1983, ate 2 crankshafts, sold 1984)
1986 Rebel 250 / N. California (purchased 2019)