Bit of useless information for those with 11 and 12 DR650's.
My bike (12) has just spat its countershaft seal as well in Missoula so that is now both our bikes three months into the trip.
Next Tuesday morning (21st August) at 8.30 am, Lelends Suzuki in Kallispell are doing two complete casing set changes on both our bikes.
Suzuki did not even bork at it so that is great so maybe they do have an issue, unsure but worth noting for anyone else that may be having issues.
Hopefully by the time we come out of there we will have two reliable bikes.
Thanks to all for input in pointing us in the right direction.