I've been using them for at least a couple of years now. They don't get an easy life with me, living where I do! About 5000 - 6000 from a rear, a bit more from a front if I was to leave it on. I always change them as a pair though. They'll be fine on an IL4, probably give you a better mileage too, than on a V twin.
Here we go,
http://www.bikespeeduk.com/pirelli-t...s/cat_226.html