Sorry to read of your KTM woes,i'll not go into how much i loath them,but,yes,lesson for everyone
go visit the bike before purchase......similar thing happened with my ATK605(he was English living
in the States,so there are bad eggs from all over!).
Think a wee visit to a lawyer is in order before you leave the US,though if it was out of State,you might
have a problem,as i found out!
Good luck,hope part 2 kicks off soon,good reading!