It's not like I've put 100k on my R60/2, but I've never had a problem with the key not working correctly. I did have to bend the contacts slightly on my /3, but now I've put 6k miles on it and haven't had a problem.
That is a great "original, pristine" R60! What keeps the salt out of those vented front brakes?Also, if you don't have the rubber band (cut from a 4.00 inner tube), what keeps water out of the switch? Here in the UK, and most other places where the authorities put salt on the roads in winter, your switch would rot away in one winter if you didn't keep it out.