NO, from Cambodia at Osmach, been crossing the border regularly with a Non-Immigrant "O" one year multi entry and the bike gets 30 days and I get 90 days on entry, most recently 10 days ago. Had a conference with the local head of customs and he would extend by 30 days from the current date if my visa was still valid. Some people say that in the South it is possible for the length of the visa, but I can't find anyone who has done that this year and can prove it with paper work, it is always "my friend with a Harley" and I can't check it out.
Please, if you can do it please let us know or PM me I you don't want the whole world to know of a loop hole that will be plugged if everyone uses it.
This tries to be a friendly help all board, do some research, and if someone wants to answer with one word , that's fine.