What they might be prepared to do is to give you a "Used bike warranty". AFAIK this covers the bike, but not all the recovery/accommodation facilities of the initial warranty.
When I took the '06 GS on a three year lease last year, the dealer agreed to underwrite a 3rd year warranty on the terms above.
As you say, if you don't ask, you'll never know.....
Friend of mine totalled his GS near Granada a couple of years ago. That had a used warranty. BMW paid for the re-patronization of the bike, car hire, medical expenses, flight home etc without argument. Very good service IMHO.
Mike



