Well, tightened the carbs down to the boots. Rode her tonight and it started again with the same symptoms. Thanks for all the advice - will keep digging.
2011 KTM 300 XC-W, 2005 CRF450x
2012 KTM 500 EXC - sold, 950 SER-sold (regret)
Prior: BMW XC, TE610, KLR 650, 07 KTM 990 Adv, and many more ...BMWs, Ducs, KTMs, Harleys