Rebuilding the switch gear on my '76 CB550F1. All going well, just new some replacement iddy biddy parts! The tiny screw and nut for the Horn button and internal springs that have got corroded.
Hard to work out the size but they are tiny. It's likely that switch gear gubbins are mostly the same for 400/500/550/750 of that era . Anyone managed to find anywhere who sells this stuff?