Went over to the above mentioned border with: - - Malaysian registered 4x4 - Malaysia Passport + Embarkation Form - My vehicle registration - Thailand import/export document The Cambodia custom only allows 160km radius of driving, i.e. we can't even drive to Silkhanoville or Phnom Phenh legally. Plus, you won't be able to buy any insurance at all. The custom will also keep the "Thailand import/export document" (documents when you enter Thailand), and they will hand you an A4 laminated document (with Cambodian language written + number). We were trying to enter Koh Khong and exit from Poi Pet, unfortunately the custom at Koh Khong is holding over Thai import/export documents. Does this applies to motorcycle as well? I am planning to ride my motorcycle next month to the same border and give it a try.