International Border Crossing with Motorbikes at Huai Kon
By the Thai immigration I was informed that the Lao side is still closed for motorbikes (and bicycles). It seems that there is a problem with the Xaraboury Immigration office, so that means all border crossings in Xaraboury are probably closed to for motorbikes. That is not only Huai Kon (Nan province) but also Phu Dao (Uttaradit province) and Thali (Loei province).
Hopefully this problem will be solved in the near future. But I would not hold my breath for it.