Lone Rider
Blokes Who Can
From a friend who tried a few days ago to cross into Cambodia from Laos: Veunkham border crossing from Laos to Cambodia is a No Go with a Thai registered bike. Not even a Ninja, ergo it is impossible. Written permit from Phnom Phen is required. Only local People are permitted. However, the Laos side let you through without stamping so you can try to negotiate with the Cambodian authorities.
Source: Stig Robert Parow
Source: Stig Robert Parow