yes they said it got so hot it burned
as far as the motor begin taken apart iam no a harley mech.
never build one but willing to learn
i have a lot of car time even build a 409
never been in a hd motor but before this is over i bet i will know more then i wish to
409 is a tricky build. Takes a good touch and long ring compressor to get the rings by those chambers in the cylinder. Even trickier machining those cylinders. Nothing tricky about working on the twin cam though. A few tools unto itself for both work and machining. But they're by no means radical.
It had to have gotten very hot for that oil to look that bad. That's nasty. Obiously none of your external modifications could account for that. I suppose an incredibly bad tuning effort could be blamed as some partial cause. But you said the bike ran well.....
You can cancel the extended warranty for a pro-rated refund. I'd still bitch at speak to Mother Harley for an explanation as to how your changes caused this problem. The simple fact of having made the changes isn't enough. The changes have to be the cause.
FWIW as some others have mentioned that disassembly is as nasty as the engine is dirty. Someone took it apart either without care or already having decided it was shelled and it didn't matter. Neither of which is the type of care you want to see from a tech doing internal engine maintenance. Watch your back (and your bike) as all this progresses.