The magnetic drive ring in my speedo drive has been broken in half for years during winter replaced it with a new one as I have a complete new spare so just took the ring out,rode the bike for the first time this year last week doesn't work!!!!! Stripped it and put the two old halfs in and it works fine :icon_confused:
Maybe its that age old, "Two halfs being more than the whole"?? :icon_lol: