My rancher has had moderate service, never sunk, never ran at WOT for long periods, just a farm bike. I think the last time I looked at it, it was just past 14,000kms and about 1400 hours. It's just starting to smoke a bit now. Motor has never been touched on it. I think if a guy was a bit more particular about the maintenance on it you could maybe push it to 2000-2500hrs, but beyond that. I'm not sure. Depends on the machine/engine too. Every model is different.