Yes he did mention. The engine failure was basically fallout from a bad diagnosis after Henry told a Ducati tech "something's wrong with my engine". Something with the oil pump. I guess the oil pump drive gear failed/got worn. They just threw in fresh oil and patted him on the back "here you go, bon voyage!"
Until it failed in Texas somewhere. (it's actually a miracle he still got that far after all I know he's has this problem for quite a while).
This whole thing could have been prevented if the first tech he mentioned this to did a proper analysis afaik...
BTW, if you ever plan on replacing your engine, the engines from the Desert Sled and the other Scrambler 800's do not mix and match bikes. The DS engine is wider at the rear...