It should be pointed out that chains aren't a part of the service; tho really they should at least check these things (like lights) but don't always. They're considered a consumerable like petrol and tyres.
I've got a ST2 and its gone thru 2 chains+sprockets and its only 15k, but I'm very aggresive with A+B but its only a 2valve
Hell I'm on my second set of tyres too and due a third. I should really fit an scottoiler, its been sitting here for a while waiting to be done.
To me tho, having it break across a solid piece of metal sounds like metal fatigue or manufacturing fault. If its your first chain on the bike for 15k then I don't blame it, it was just plain knackered/old.
It's a shame it didn't just fly out the back, coz thats one hell of a bill! Unlucky mate.
[Edited on 7-8-2005 by moozaad]