We crossed into Cambodia from Southern Laos, it was hard to find the correct road at the time due to road works, found the river crossing crossing first, which is no good for vehicles, ended up going back, then down a poorly made dirt track then there was the Laos and Cambodian crossing points, 50 metres south was a double lane bitumen road, confused them with Aussie rego and was told to check in at the next town, damn, forgot! If it's a bike larger than 175cc forget Vietnam!