The R and S models have the same engine, and the Duke is the same in that area. The R does have a different shock so if some of those are suffering from heat from the cat that could be a reason.
Some later feedback on the clutch issue suggests that blockage of the centre oil jet (just 0,3mm dia) could have been caused by excess Loctite on the jet from factory assembly, though this is not yet confirmed. Others think that wrongly adjusted clutch with no free play could have led to clutch slip generating excess heat.
Given that there seems to have been no more occurrences and that all the failures were on low mileage engines I tend to the former. While it's a poor show if KTM aren't picking up warranty I suspect this could be associated with owner attitude and dealer support as much as anything.
I've done 8,000 miles on mine so far with no mechanical problems and planning to do 20,000 round central Asia later this year. Don't let a few isolated events put you off what is a very good bike.
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