I just did a head gasket job on my 06 just under 30k. I was on a trip in Baja. Running at sustaind triple digets for hours on end. Coolent started to puke on my right leg. I found a small amount of greyish slugs in my expantion tank. I re routed the over flow line into a coke bottle filled with water. So the over flow tube is submerged. Start bike, see bubbles? Head gasket blown!
I pulled the jugs and head and had them resurfaced, new rings and gaskets.
One cylinder defiantly had a low spot.
Good luck and have fun. The 950 motors are fun and easy to work on once out of bike.
06 KTM 950 ADV:The Queen
2006 KTM EXC 450 DUAL SPORT :The Saturday night hooker
1997 CR85E W/ DMC FRAME XR125 MOTOR AND CALI PLATE!! :The Professor