Since you're an experienced mechanic, that's good, it will help you re-build your engine quickly by yourself. IMHO a replacement engine (like the link I gave you) would be an easier option, but you know best. Waiting until after your very first oil change at just 620 miles to "get after it" was a smart move. I hope the engineers take note at the problems they designed into this bike.

Winter in Kansas? Of course you are running 10w-30 Amsoil right?

https://www.manualslib.com/manual/82...page=83#manual

Making the mistake of putting super thick 20w-50 weight oil in it and riding in any temps below 40* ambient could be catastrophic.
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I'm sure you know that. Just checking.