My 7" headlight fell out again.
Fortunately, the wires kept it from hitting the pavement so it just rattled against the top of the front fender as I came to a stop.
After getting it re-installed and getting home I studied the issue.
This isn't the first time this has happened. The last time it did, I decided the steel retainer clamp wasn't applying enough force inside the top of the outer chrome headlight ring because it was too short.
That time, I used some soft lead solder to build up the outer ends of the steel clamp and it hasn't given me trouble for about a year.
Looking at the solder on the clamp today, it was obvious the outer ring had been vibrating directly against it and had pounded it down causing the ring to become unclamped (even though the clamp screw was still tight).
To avoid this hammering (swaging) on the soft solder in the future, I cut a thin.030" (0.76mm) piece of brass stock just slightly larger than the working surface of the metal clamp where it touches the headlight rim.
After "tinning" the piece of brass, I soldered it in place and then filed it down to the same width and length of the clamp.
This essentially added about .040" (1mm) to the height of the clamp.
It seemed to tighten up against the inside of the headlight ring very nicely.
Hopefully, the brass will make a much harder surface for the vibration to work on and it will last this time.