i went to the inagural event right around the corner from my house! any way there was a KTM in the experts race.
though it didnt win, after in the pits i had a chance to talk to one of their mechanics.

if he is to be believed, he said in the 6 years they have been running them the only major problem they have had is a blown motor from and oil leak, and that the 990 was bullet proof. he said the only thing they do is change the rings from year to year and that they didnt even need that, he said they didnt even require valve adjustments or actually that they stayed within spec. he said they kept them stock internally. the bikes had custom frames and exhausts and were loud as hell, they didnt really sound good to my ear loud and ratty. in a field of Harleys, Ducati, and a Triumph, it seemed the quickest most consistant machine was an EX650.